In 2026, flying to or within the United States has become an art of strategic packing. With airlines increasingly unbundling their services and dynamic pricing reaching baggage counters, the cost of your "cheap" flight can nearly double if you aren’t careful. This guide provides the most up-to-date look at the baggage landscapes of the nine major U.S. carriers.
Introduction: What You Need to Know About U.S. Airline Baggage Rules
Why do baggage rules matter so much in 2026? It’s simple: Baggage is now a primary revenue driver for airlines.
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Price Creep: In the last two years, almost every major carrier has increased checked bag fees by $5–$10.
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The "Basic Economy" Trap: On many airlines, your ticket might not even include a standard carry-on. Crucially, even full-service legacy carriers like American (AA), Delta, and United (UA) have adopted "Basic Economy" models where a free checked bag is almost never included.
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Carry-on Restrictions: While Delta and American currently allow a carry-on in Basic Economy, United Airlines specifically prohibits a full-size carry-on for Basic Economy passengers, allowing only one small personal item. If you bring a carry-on to the gate on such a fare, be prepared for a heavy gate-check fee plus a service surcharge.
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Efficiency: Knowing the rules helps you breeze through TSA and boarding without "gate-check" surprises.
Basic Baggage Concepts Explained
Before diving into specific airlines, let's define the 2026 standards:
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Personal Item: Must fit under the seat in front of you (laptop bags, purses, small backpacks).
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Carry-on Baggage: Larger bags (wheeled suitcases) that go in the overhead bin.
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Checked Baggage: Bags handed over at the counter to be stored in the aircraft hold.
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Oversize/Overweight: Anything exceeding 62 linear inches (L+W+H) or 50 lbs (23kg). Note: 2026 rules have seen some ULCCs lowering "standard" weight limits to 40 lbs.
How Airlines Measure Baggage
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Linear Inches: Length + Width + Height (including wheels and handles).
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Metric Conversion: 50 lbs ≈ 22.6 kg | 22x14x9 inches ≈ 56x35x23 cm.
Disclaimer: Baggage policies are updated frequently. While this guide is updated for 2026, always check your specific fare rules on the airline’s app before heading to the airport.
The Three Tiers of Airlines
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Legacy Carriers (Delta, United, American): Offer more perks but charge for every bag in Basic Economy.
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Hybrid Carriers (Southwest, Alaska, JetBlue): Focus on customer experience; Southwest remains the "holy grail" with free bags.
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Ultra-Low-Cost Carriers (ULCCs) (Spirit, Frontier, Allegiant): Everything has a price tag—even your overhead bin space.
1. Legacy U.S. Airlines: Delta, United, and American
Delta, United, and American are the three major U.S. legacy airlines. They offer broader routes, more flexible baggage policies, and extra perks for frequent flyers. Elite status, co-branded credit cards, or fare bundles can reduce or waive baggage fees, making them ideal for checked luggage and long-haul travel.
Delta Air Lines Baggage Policy Overview
| Category | Allowance & Fees | Restrictions | Notes |
|---|---|---|---|
| Carry-on (Cabin Bag) | Free: 1 carry-on + 1 personal item | Carry-on: Total dimensions ≤ 45 in (114 cm); Single bag: 22” x 14” x 9” (56 x 35 x 23 cm) | Can include stroller, wheelchair, car seat, or cane. Best for essentials. |
| Checked Baggage – Domestic |
1st bag $35 (≤23 kg), 2nd bag $45; Delta SkyMiles® American Express Card Members: 1st bag free |
Baggage size must not exceed 62 inches (158 cm) when you total LENGTH + WIDTH + HEIGHT ≤23 kg (some premium cabins up to 32 kg) |
3rd bag $150, 4th–10th $200 each |
| Checked Baggage – International | 1st bag free | Max 62 in (158 cm), ≤23 kg (some premium cabins up to 32 kg) |
US/CA - bag 3: $150; bags 4-10: $200 each US/CA-South America/Caribbean Bag 3-10: $200 each US/CA - Mexico: bag 3: $180; bags 4-10: $200 each North/Central/South America - Europe/North Africa: Bags 3-10: $285 each
|
| Oversize / Overweight Fees - Domestic |
Over weight: 51-70lbs. (23kg-31.75kg) - $100; 70-＜100lbs. (32kg-45.36kg) - $200 Oversized: 63"-80" (161-203cm): $200 （linear inches: length + width + height) International oversize: from $150 |
US/Canada max 45.36 kg; |
Overweight: bags 100lbs. (45.36kg) or more are not permitted Oversized: Bags larger than 80" (203cm) are not permitted |
| Oversize / Overweight Fees - International |
Overweight: flights between U.S./Canada - 51–70 lbs (23–31.75 kg): $100; 71–99 lbs (32.21–45.36 kg): $200 flights North / South / Central America ↔ Europe / North Africa-51–70 lbs (23–31.75 kg): $100 USD Mexico / Central America / South America / Caribbean -51–70 lbs (23–31.75 kg): $100; 71–99 lbs (32.21–45.36 kg): $200 Asia ↔ Everywhere - 51–70 lbs (23–31.75 kg): $100; 71–99 lbs (32–45.36 kg): $200
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Overweight: US & Canada (including Puerto Rico & U.S. Virgin Islands): max 100 lbs (45.36 kg) North/South/Central America ↔ Europe/North Africa, Australia/NZ, Europe/South Africa/UAE: max 70 lbs (31.75 kg) |
Between U.S./Canada & U.S./Canada 100+ lbs (45.36 kg) are not permitted; Bags exceeding 70 lbs. are not allowed to/from Europe; Bags exceeding 70 lbs. are not allowed to/from Australia / New Zealand ↔ Everywhere. |
Excess Baggage: Up to 10 bags may be checked per passenger on flights operated by Delta or Delta Shuttle. Up to 4 bags may be checked bags on Delta Connection® carrier flights.
Detailed Policy Deep-Dive: Delta Air Lines
Delta remains the most "premium" of the legacy carriers regarding baggage. Unlike its competitors, Delta has resisted banning carry-ons for Basic Economy passengers. In 2026, Delta's baggage tracking via the Fly Delta app is industry-leading, providing real-time notifications when your bag is loaded onto or off the aircraft. For those flying internationally, Delta's 1st bag is often still free, but domestic routes have seen a slight price hike to reflect rising fuel costs.
How to Reduce Delta Baggage Costs
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SkyMiles Status: SkyMiles Medallion members traveling in Delta One or Delta First Class can check up to 3 bags free of charge, with each bag weighing a maximum of 32 kg. SkyMiles Medallion members traveling in Delta Premium Select on domestic flights can check up to 2 bags free of charge, with each bag weighing a maximum of 23 kg. [More details about Delta SkyMiles Medallion® Members Bag Allowance]
- Military/Special Passengers: Active-duty military personnel receive additional free baggage allowance.
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Delta Co-branded Credit Cards: Holding a Gold, Platinum, or Reserve Amex saves the first bag fee for you and up to 8 companions.
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Premium Cabins: Booking Comfort+, First Class, or Delta One always includes free checked baggage.
Common Traps to Avoid
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Overweight Fees: Delta is strict on the 50lb limit for domestic economy; even being 1lb over can trigger a $100 fee.
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Airport Counter Rates: Always ensure your bag is within limits before reaching the counter to avoid last-minute premium charges.
United Airlines Baggage Policy Overview
| Category | Allowance & Fees | Restrictions | Notes |
|---|---|---|---|
| Carry-on (Cabin Bag) | 1 carry-on + 1 personal item free |
Carry-on: 9 in x 14 in x 22 in (23 cm x 35 cm x 56 cm) cm) Personal item: 9 in x 10 in x 17 in (22 cm x 25 cm x 43 cm) |
Can include stroller, wheelchair, car seat, or cane. Basic Economy (domestic): only 1 personal item; carry-on fees start at $35, $65 if it doesn’t fit under the seat |
| Checked Baggage – Domestic | 1st bag $40, 2nd bag $50 |
Maximum size: 30 in x 20 in x 12 in (76 cm x 52 cm x 30 cm) or 62 total in., including handles and wheels. Weight: Economy ≤23 kg, Business ≤32 kg |
Basic Economy: higher fees than standard economy |
| Checked Baggage – International | 1st bag free (standard economy) | Same dimensions & weight limits as domestic | Basic Economy: higher fees; 1 free bag may not apply |
| Oversize / Overweight / Excess | Fees apply for oversized, overweight, or extra bags | Max dimensions (L+W+H): 115 in (292 cm)Max weight: 100lbs (45 kg); instruments & assistive devices up to 165lbs (75 kg) |
Oversize: Measure (length + width + height) more than 115 inches (292 centimeters) are not allowed Overweight: more than 100 pounds (45 kilograms) are not allowed |
Detailed Policy Deep-Dive: United Airlines
United continues to have the most restrictive Basic Economy policy in the U.S. If you book this fare, you are essentially paying for a "seat only." In 2026, United uses gate agents equipped with handheld scanners to identify Basic Economy passengers attempting to board with overhead bin luggage. However, their "baggage delivery" service (for a fee) has become popular for travelers who want their suitcases delivered directly from the plane to their home or hotel.
How to Reduce United Baggage Costs
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MileagePlus Status: Premier Gold members can check two bags free of charge, each weighing up to 70 pounds (32 kg), when traveling to and from the United States, Canada, Puerto Rico, and the U.S. Virgin Islands. For travel on designated international routes, Premier Gold members can check three bags free of charge, each weighing up to 70 pounds (32 kg).
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Chase United Cards: Cards like the United Explorer or Quest provide free checked bags and allow carry-ons for Basic Economy flyers.
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Pre-paying Online: Paying for your checked bag at least 24 hours before your flight usually saves you $5 per bag.
Common Traps to Avoid
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Basic Economy Carry-on: If you bring a carry-on to the gate on a Basic Economy ticket, you will be charged the standard checked bag fee plus a $30 gate handling fee.
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Personal Item Size: Ensure your personal item doesn't exceed 9"x10"x17", or it may be classified as a carry-on.
American Airlines Baggage Policy Overview
| Category | Allowance & Fees | Restrictions | Notes |
|---|---|---|---|
| Carry-on (Cabin Bag) | 1 carry-on + 1 personal item free |
Personal items max: Dimensions should not exceed 18 x 14 x 8 inches (45 x 35 x 20 cm) Carry-on max: cannot exceed 22 x 14 x 9 inches |
Can include diaper bag (1 per child), breast pump, small soft-sided cooler for breast milk, car seat, stroller, medical or mobility devices |
| Checked Baggage – Domestic | 1st bag $40 ($35 if paid online), 2nd bag $45, 3rd $150, 4th or more $200 each |
Max dimensions: 62 in (158 cm) Weight: >23 kg counts as overweight For First / Business, weight is 70 lbs / 32 kgs for free bags and 50 lbs / 23 kgs for excess charged bags |
Check up to 10 bags on American Airlines operated flights if your trip is: domestic, trans-Atlantic and Trans-Pacific; Check up to 5 bags on American-operated flights if you’re traveling to / through / from: Mexico / Caribbean / Central America, South America and Brazil. |
| Checked Baggage – Canada/Caribbean/Mexico/Central America/Guyana | 1st bag $35, 2nd bag $45, 3rd $200, 4th or more $200 each | Same dimensions and weight limits as domestic | Paid per direction |
| Checked Baggage – International |
1st bag free (standard economy);Some cabins/routes: up to 3 free bags Trans-Atlantic & Trans-Pacific (excl. Australia / NZ): 1st bag $75, 2nd $100, 3rd $200, 4th or more $200 each |
Max dimensions: 62 in (158 cm) Weight: >23 kg counts as overweight |
Basic Economy: 1st bag $45–$70 depending on route |
| Overweight Fees |
Over 50 lbs / 23 kgs to 53 lbs / 24 kgs - $30; Over 53 lbs / 24 kgs to 70 lbs / 32 kgs -$100 (to Cuba $200) Over 70 lbs / 32kgs to 100 lbs / 45 kgs -$200 |
Max weight: 45 kg |
Business and Domestic First confirmed customers can check 2 bags up to 70 lbs / 32 kgs at no extra cost. |
| Oversize Fees |
62–65 in / 158–165 cm: $30 >65 in / >165 cm: $150–$200 |
Max dimensions allowed: 115 in / 292 cm |
Checked bags over 115 in / 292 cm in total dimensions (length + width + height) are not accepted. |
Detailed Policy Deep-Dive: American Airlines
American has taken a middle-ground approach. While they permit carry-ons for all passengers, they have shifted their checked bag pricing to favor digital self-service. By 2026, the price gap between prepaying via the AA app and paying at the ticket counter has widened to encourage a "touchless" airport experience. Their "Flagship Business" and "First" cabins still offer a generous three-bag allowance (up to 70 lbs each).
How to Reduce American Baggage Costs
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AAdvantage Status: Confirmed Flagship® First and Flagship® Business Plus customers, as well as AAdvantage Executive Platinum®, AAdvantage Platinum Pro®, and one world® Emerald members, can check three bags weighing up to 70 lbs/32 kg each for free.
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Citi/Barclays AAdvantage Cards: Most co-branded cards offer the first checked bag free for the cardmember and companions.
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Elite Partner Status: Alaska Airlines MVP members also get free bags on American.
- When paying for travel within the United States and between the United States (including Hawaii and Alaska, Puerto Rico, and the U.S. Virgin Islands) online through the AA website or app, you can save $5 on the first checked bag fee.
Common Traps to Avoid
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Oversize Linear Inches: American is particularly strict about the 62-linear-inch limit; always measure including wheels.
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Gate Check Confusion: While gate checking is often free, if you are forced to check a bag that exceeds carry-on dimensions, you will pay the standard fee.
2. Hybrid Carriers: Southwest, Alaska, and JetBlue
Hybrid carriers represent the middle ground of the American aviation market, blending the extensive networks of legacy airlines with more passenger-friendly baggage flexibility or value-driven perks. While each has a distinct personality—from Southwest's legendary free checked bags to Alaska’s West Coast hospitality and JetBlue’s tech-forward experience—they all generally offer a more transparent baggage experience than the ultra-low-cost alternatives. However, stay alert for specific fare-class restrictions, such as JetBlue's "Blue Basic," which mirror the constraints of legacy Basic Economy.
Southwest Airlines Baggage Policy Overview
| Category | Free Baggage Allowance | Key Restrictions | Notes |
|---|---|---|---|
| Carry-on Baggage | For general passengers with bookings/tickets issued or changed on or after May 28, 2025: 1 carry-on bag + 1 personal item free of charge | Maximum size: 24 in (L) + 16 in (W) + 10 in (H) | — |
| Checked Baggage | Choice Extra fare, Rapid Rewards® A-List Preferred members, and Getaways by Southwest™ customers: 2 checked bags free |
Weight limit: up to 50 pounds each Size limit: 62 inches (L + W + H) including wheels and handles |
For inter-island Hawaii travel booked, ticketed, and/or changed on or after May 28, 2025, Hawaii residents receive the first 2 checked bags free |
| Checked Baggage (General Passengers) |
1st checked bag$35, 2nd for $45, 3rd for $150 |
Same weight and size limits as above | Applies to bookings/tickets issued or changed on or after May 28, 2025 |
| Oversized / Overweight Baggage |
Oversized (63"-80") : $200 + standard fee; Overweight (51-70 lbs.) $100 + standard fee; Overweight (71-100 lbs.) $200 + Standard Fee Oversized & Overweight: $200 + Standard Fee |
Interisland Hawaii flights: Oversized (63"-80") $35 + standard fee Overweight (51-70 lbs.) $35 + standard fee Overweight (71-100 lbs.) $70 + standard fee |
Detailed Policy Deep-Dive: Southwest Airlines
Even with the 2026 introduction of assigned seating and extra-legroom rows, Southwest has vowed to keep its "Bags Fly Free" mantra. This makes Southwest the default choice for families, college students, and anyone moving bulky items. It is important to note that their 24"x16"x10" carry-on limit is slightly more generous than the Big Three, making it easier to fit hardshell luggage that often gets rejected elsewhere.
How to Reduce Southwest Baggage Costs
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Take Advantage of the 2-Bag Rule: No action needed; just fly Southwest to save $70-$80 roundtrip compared to other carriers.
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Rapid Rewards Chase Cards: Earn points to pay for flights, further offsetting any travel costs.
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Military Benefits: Active duty military enjoy even more generous weight and count allowances.
Common Traps to Avoid
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Weight Limit Enforcement: While they give two bags for free, the 50lb limit is firm. Distribute weight between your two free bags to avoid the $100 overweight fee.
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The 3rd Bag Jump: The jump from $0 to $125 for a third bag is one of the steepest in the industry.
Alaska Airlines Baggage Policy Overview
| Category | Allowance / Charges | Limitations | Remarks |
|---|---|---|---|
| Carry-on Baggage | Each passenger is permitted one (1) carry-on bag and one (1) personal item |
Carry-on dimensions must not exceed 22 x 14 x 9 inches (including wheels and handles) Maximum weight: 7 kg |
Passengers traveling with infants or children may carry one stroller and one child safety seatMobility aids and medically necessary assistive devices are accepted at no additional charge |
| Checked Baggage – Domestic Flights | 1st checked bag $40 ($35 pre-pay), 2nd $45, 3rd $150, 4th+ $150 per bag |
Maximum weight per bag: 50 lbs Maximum size: 62 linear inches (L + W + H) |
Multiple charges may apply to a single bag, including checked baggage fees and applicable overweight and/or oversized charges |
| Checked Baggage – International Flights |
Europe: Frist Class & Business Class & Premium Economy- 2 free checked bag, 3rd $200, 4th+ $200 per bag; Asia: Premium Economy & Main Cabin 2 free checked bags, 3rd $200, 4th+ $200 per bag |
Frist Class & Business Class: up to 70 lbs Premium Economy & Main Cabin up to 50lbs
|
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| Overweight and Oversized Baggage -
North America |
Overweight bag (51-70 lb): $100 per bag; Overweight bag (71-100 lb): $200 per bag Oversized bag (63-115 in): $200 per bag |
Charges apply per bag | — |
| Overweight and Oversized Baggage – International | Europe: Overweight bag (up to70 lb) $100 per bag, Overweight bag (71-100 lb) - $200 per bag; Oversize bag (63-115 in) per bag |
Asia: Premium Economy, Business Class & First Class free for first 3 Overweight bag (up to70 lb); Overweight bag (71-100 lb) $200; Oversize bag (63-115 in) $200 Europe: Business Class & First Class free for first 2 Overweight bag (up to70 lb); Overweight bag (71-100 lb) $200; Oversize bag |
Detailed Policy Deep-Dive: Alaska Airlines
Alaska Airlines leans heavily into its West Coast identity. Their baggage policy is relatively straightforward, but they offer unique "regional" perks. In 2026, their partnership with Hawaiian Airlines has expanded baggage reciprocity, making it easier for travelers to hop between the mainland and the islands. Their "Wine Flies Free" program remains a fan favorite for travelers departing from 30+ West Coast wine-country airports.
How to Reduce Alaska Baggage Costs
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Alaska Airlines Visa Signature®: Offers a free checked bag for you and up to 6 guests on the same reservation.
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MVP Status: Members of the Mileage Plan program receive multiple free bags depending on their tier.
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Wine Flies Free: On certain West Coast flights, a case of wine can be checked for free for Mileage Plan members.
Common Traps to Avoid
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20-Minute Bag Guarantee: Alaska promises your bags at the carousel within 20 minutes, or you get 2,500 miles—don't forget to claim it if they're late!
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Partner Booking: Rules may change if your flight is operated by American Airlines but booked via Alaska.
JetBlue Baggage Policy Overview
| Category | Free Allowance & Fees | Key Restrictions | Remarks |
|---|---|---|---|
| Carry-on Baggage | Each passenger may bring one (1) carry-on bag and one (1) personal item at no additional charge |
Carry-on size: not exceed 22" L (55.88 cm) x 14" W (35.56 cm) x 9" H (22.86 cm) Personal items must not exceed 17" L (43.2 cm) x 13" W (33 cm) x 8" H (20.32 cm) |
Infant car seats may be carried onboard subject to availability of space |
Checked Baggage –
Within the U.S., Latin America, Caribbean and Canada |
Blue / Blue Basic / Blue Extra / EvenMore: off-peak 1st bag $35, 2nd $50; peak 1st bag $40, 2nd $60 The fee for 3rd checked bag is $125 off-peak or $135 peak, and for 4th checked bag (or more) is $150 off-peak or $160 peak. |
Checked bags not exceed 62" (157.48 cm) in overall dimensions (length + width + height) Weight: not exceed 50 pounds (22.68 kg) |
Checked baggage fees may be adjusted during peak travel periods and high-demand flights Save $10 each on your first 2 checked bags when you add them before check-in (at least 24 hours before departure). |
| Checked Baggage – Transatlantic Flights | Blue Basic: off peak 1st bag $60, 2nd bag $100; peak 1st bag $65, 2nd bag $110 Blue / Blue Plus / Blue Extra / EvenMore: off peak 1st bag free, 2nd bag $100; peak 1st bag free, 2nd bag $110 Mint: 2 free checked bags（≤ 70 lbs / 32 kgs） |
Same weight and size limits as domestic flights |
The fee for a 3rd checked bag (or more) on transatlantic routes is $200/£150/€185 for off-peak and $210/£160/€195 for peak.
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| Overweight / Oversized Baggage |
51 lbs (23.13 kg) – 99 lbs (44.91 kg): $150 per bag (on transatlantic flights) 63" in (160 cm) – 80 in (203.3 cm, including wheels and handles): $150 per bag ($150 on transatlantic flights).
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Fees apply per bag |
Bags that exceed 70 pounds (31.75 kg) are not accepted on transatlantic flights |
*Checked baggage fares base on "More than 24 hours before departure" standard and including pre-paid discount.
Detailed Policy Deep-Dive: JetBlue
JetBlue has moved closer to a ULCC (Ultra-Low-Cost Carrier) model with its "Blue Basic" fare. In 2026, the airline utilizes AI to manage overhead bin space, often asking for volunteers to check bags earlier in the boarding process. For travelers flying trans-Atlantic (London, Paris, Amsterdam), JetBlue's "Mint" cabin allows two checked bags up to 70 lbs, which is very generous compared to their domestic economy offerings.
How to Reduce JetBlue Baggage Costs
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Mosaic Status: All Mosaic members get two free checked bags and can bring carry-ons on any fare.
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JetBlue Plus & Premier Cards: Provides one free checked bag for the primary cardholder and companions.
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Booking "Blue Extra": This mid-tier fare includes a carry-on and priority boarding, which can be cheaper than adding a bag to Blue Basic.
Common Traps to Avoid
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Dynamic Pricing: JetBlue's bag fees can be higher during peak travel periods (holidays/summer). Check the calendar before booking.
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Blue Basic Restrictions: Like United, Blue Basic is very strict; any carry-on brought to the gate will result in heavy fees.
3. Ultra-Low-Cost Carriers: Spirit, Frontier, and Allegiant
Ultra-Low-Cost Carriers (ULCCs) are defined by their "unbundled" pricing model, where the base fare covers little more than your seat. These airlines operate on a high-volume, low-margin basis, making ancillary fees—especially for baggage—their primary source of profit. In 2026, navigating these carriers requires surgical precision in packing; nearly everything larger than a standard school backpack incurs a fee, often exceeding the cost of the ticket itself if not booked in advance. To avoid "sticker shock" at the gate, it is vital to understand their specific sizing sizers and lower-than-average weight thresholds.
Spirit Airlines Baggage Policy Overview
| Category | Free Allowance & Fees | Key Restrictions | Remarks |
|---|---|---|---|
| Carry-on / Personal Item |
Only one (1) personal item is permitted free of charge Carry-on bag $45- $99 Premium Economy and Spirit First fares include one (1) carry-on bag |
Personal item size: Dimensions must not exceed 18 x 14 x 8 inches (45 x 35 x 20 cm) including handles and wheels. Carry-on: Maximum of 22 x 18 x 10 inches (56 x 46 x 25 cm) including handles and wheels | Passengers traveling with infants or children may bring one child safety seatMobility aids and medically necessary assistive devices are accepted at no additional charge |
| Checked Baggage |
Spirit First fare includes one (1) free checked bag All other fare types: checked baggage fees apply 1st checked bag $40 - $95, 2nd checked bag $50 - $100 |
Maximum weight: 22.6 kg (50 lbs) Maximum size: 62 linear inches (158 cm) |
Bags weighing over 100 lbs (45 kg) or measuring more than 80 inches (203 cm) are not accepted |
| Overweight / Oversized Baggage |
Overweight 23–45 kg: $125 Oversized 158–203 cm: $150 |
Fees apply per bag |
Detailed Policy Deep-Dive: Spirit Airlines
Spirit underwent a major brand transformation in late 2024 and 2025, introducing "Go Big" and "Go Comfy" bundles. In 2026, while the unbundled "Go" fare remains, these bundles have simplified the baggage process by including carry-ons and checked bags. Interestingly, Spirit's carry-on size is one of the widest in the industry (18 inches wide), which accommodates bulky duffel bags better than the legacy carriers' 14-inch limit.
How to Reduce Spirit Baggage Costs
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Free Spirit Status: Gold members get a free carry-on and a free checked bag.
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Spirit Saver$ Club: Offers discounted baggage rates for members, often paying for the membership in one trip.
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Book Everything at Once: Adding bags at the initial booking is significantly cheaper than adding them after check-in or at the gate.
Common Traps to Avoid
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The 18x14x8 Rule: Spirit employees are known for checking personal item sizes at the gate; if your backpack is stuffed, you might pay $99 on the spot.
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Airport Kiosk Fees: Don't wait until the airport to buy your bag; the price can double.
Frontier Airlines Baggage Policy Overview
| Category | Free Allowance & Fees | Key Restrictions | Remarks |
|---|---|---|---|
| Carry-on / Personal Item |
Only one (1) personal item is permitted free of charge Carry-on bags are subject to a fee, starting from $59 when purchased online in advance or at the time of booking |
Personal item size: 14 in (H) x 18 in (W) x 8 in (D) Carry-on size: 24 in (H) x 16 in (W) x 10 in (D) Carry-on weight must be under 35 lbs |
A stroller may be carried onboard if it fits in the overhead bin |
| Checked Baggage | All checked bags are subject to a fee (similar to Spirit Airlines; earlier purchase is cheaper)1st checked bag: from $44 (online/in advance)2nd checked bag: from $59 |
Maximum weight: under 40 lbs Maximum size: 62 linear inches (L + W + D) |
Strollers and car seats are checked free of charge |
| Overweight / Oversized Baggage |
Oversized bags 63–110 linear inches: $75 per bag Overweight 41–50 lbs: $75 per bag Overweight 51–100 lbs: $100 per bag |
Fees apply per bag | Except for assistive devices, bags weighing more than 100 lbs (45 kg) or measuring more than 110 inches are not accepted |
Detailed Policy Deep-Dive: Frontier Airlines
Frontier is notorious for its strict 40lb weight limit for checked bags, a trend they started and continue to enforce aggressively in 2026. They have also introduced automated "Personal Item Sizers" that use cameras to detect if a bag is too large without an agent intervention. However, their "Discount Den" continues to be a powerful tool for frequent flyers to slash baggage costs by up to 30%.
How to Reduce Frontier Baggage Costs
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Discount Den membership: Members get exclusive access to lower bag fees and "Kids Fly Free" deals.
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Paying for bags during booking: This is the absolute lowest price you will find for Frontier luggage.
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Bundles: "The Works" or "The Perks" often end up cheaper than adding a carry-on and seat selection individually.
Common Traps to Avoid
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Personal item size enforcement: Frontier is the most aggressive with the "sizer" box. Ensure your bag drops in freely.
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Gate fees: Expect to pay nearly $100 if you try to board with an undeclared carry-on.
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40lb Weight Limit: Most airlines use 50lbs; Frontier uses 40lbs. That 10lb difference often catches travelers off guard.
Allegiant Air Baggage Policy Overview
| Category | Free Allowance & Fees | Key Restrictions | Remarks |
|---|---|---|---|
| Carry-on / Personal Item |
Only one (1) personal item is permitted free of charge Oversized personal item: $50–$75 Carry-on bag: $10–$75 (much cheaper when purchased at booking) |
Personal item size: 8 x 14 x 18 in (20 x 35 x 45 cm) Carry-on size: 10 x 16 x 22 in (25 x 40 x 55 cm) |
Purchasing baggage at the time of ticket purchase is strongly recommended to avoid higher fees |
| Checked Baggage |
All checked bags are subject to a fee After booking: $70 per bag At airport: $75 per bag |
Maximum weight: 22 kg (48.5 lbs) Maximum size: 80 linear inches (203 cm) Maximum 4 checked bags per passenger |
Checked baggage fees are charged per flight segment, including connecting flights |
| Infant Items | One stroller and one infant/child car seat may be checked free of charge per paying passenger | — | Applies at the ticket counter |
| Overweight / Oversized Baggage |
Overweight Bag - 51 to 70 lbs (23.1 to 31.8 kilos): +$50 Overweight Bags - 71 to 100 lbs (32.2 to 45.4 kilos): + $75 Oversized Checked Bag - height + width + depth in excess of 80 in. (203.2 cm): +$75 |
Fees apply per bag and per segment | Overweight penalties are relatively high |
Detailed Policy Deep-Dive: Allegiant Air
Allegiant operates differently by focusing on leisure travelers from smaller airports to vacation destinations. In 2026, their baggage fees remain "dynamic," meaning a flight to a popular destination like Orlando during Spring Break will have significantly higher baggage fees than a random Tuesday flight to a small hub. Their personal item limit is the smallest of the group (only 7 inches deep), requiring travelers to be extremely mindful of their under-seat bag choice.
How to Reduce Allegiant Baggage Costs
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Pre-purchasing luggage: Always buy your baggage allowance at the time of initial flight booking for the lowest "route-based" price.
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Avoiding airport add-ons: Allegiant charges extra for printing boarding passes and other counter services—do everything on the app.
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Allegiant World Rewards Card: Can provide occasional benefits and points toward baggage costs.
Common Traps to Avoid
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Dynamic Route Pricing: A bag on a flight to Las Vegas might cost more than a bag on a flight to a smaller regional airport.
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Gate Fees: Similar to other ULCCs, any bag that doesn't fit the "Personal Item" sizer will cost a premium at the gate.
Special Baggage Rules Most Travelers Overlook
Musical Instruments: The Federal Protection Act
Under the FAA Modernization and Reform Act, airlines must allow small musical instruments (violins, guitars) as carry-ons if there is room in the overhead bin at the time of boarding.
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Carry-on Advantage: Unlike standard luggage, instruments often have a "size waiver" if they fit in the bin, even if they slightly exceed standard linear dimensions.
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Large Instruments (Cello/Double Bass): These almost always require a "Cabin Seat Baggage" ticket. You must purchase a full-fare seat for the instrument, and it must be secured in a window seat to meet safety codes.
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Checking an Instrument: If you must check it, use a flight-safe hard case and ensure the airline's liability limit (usually $3,800 for domestic) covers the value.
Sports Equipment: Beyond the Basic Bag
Many travelers assume sports gear defaults to "Oversize," but most airlines have favorable "Substitution" rules:
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Ski/Snowboard Exception: Almost all carriers (Delta, United, Southwest) allow one ski/snowboard bag plus one boot bag to count as one single checked item. If the weight of both together is under 50 lbs, no extra fee applies.
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Golf Clubs: These are treated as standard checked bags on most 2026 routes. However, they must be in a hard-sided case to qualify for damage liability coverage.
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Surfboards & Bicycles: These usually incur a specialized "Media/Sports" fee ranging from $30 to $150. Alaska Airlines is notably the most affordable for these items.
Family and Medical Items: The "Zero-Fee" Category
These items are federally protected and cannot be charged baggage fees or count toward your item limit:
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Strollers & Car Seats: You can check these for free at the ticket counter or "Gate Check" them just before entering the plane. Most 2026 carriers allow "compact" strollers (like the Babyzen YOYO) to be stored in overhead bins.
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Breast Pumps & Milk: In 2026, breast pumps are classified as medical devices. They do not count toward your carry-on or personal item limit. Coolers containing breast milk are also exempt from item counts.
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Medical Devices (CPAP/Oxygen): Any assistive device (CPAP, cane, portable oxygen concentrator) is a "free" carry-on. You are allowed to bring these in addition to your standard personal item and carry-on.
Ultimate Money-Saving Tips for 2026
1. Master the "Bundle Mathematics"
In 2026, airlines use algorithmic pricing for bag add-ons.
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The Rule of 24: Adding a bag during the initial 24 hours after booking is almost always 20-30% cheaper than adding it during check-in.
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Compare Fares vs. Fees: Before booking a $49 Frontier flight, check the "Bundle" price. If "The Works" bundle is $70 but includes a carry-on ($60 value), a checked bag ($55 value), and seat selection ($30 value), the "expensive" ticket actually saves you $75.
2. Leverage Dynamic Pricing Avoidance
Airlines like JetBlue and Allegiant now use Peak Day Pricing for bags.
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Check the Calendar: Bag fees on a Friday or Sunday can be $5–$15 higher than on a Tuesday or Wednesday. If your travel dates are flexible, shifting your flight by 24 hours could save you $30 in baggage fees alone.
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Multi-Segment Trick: If you have a connection with two different airlines, always pay the baggage fee to the first carrier. Their rules usually apply to the entire one-way journey.
3. The "Credit Card Carry-Over" Strategy
You don't need to spend thousands to get free bags.
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The $95 Investment: Most airline credit cards have a $95 annual fee. Since a single round-trip checked bag now costs $70–$80, the card pays for itself in just one trip.
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Companion Coverage: Most cards cover up to 8 people on the same reservation. One cardholder can save a group of friends over $600 in fees on a single vacation.
4. Smart Packing & Tech Hacks
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Apple AirTags / Trackers: While not a direct "saving," placing a tracker in your bag allows you to bypass long "Lost Luggage" lines and prove to the airline exactly where your bag is, speeding up reimbursement claims.
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The "Wearable" Bag: In 2026, "fishing vests" or "travel jackets" with 10+ pockets have become a viral hack to bypass ULCC personal item limits. You can fit 3 days of clothes in a jacket, which doesn't count as a bag.
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Vacuum Compression Bags: Essential for fitting a "Carry-on" amount of clothes into a "Personal Item" sized backpack.
5. Utilize "Hidden" Free Items
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The Duty-Free Loophole: Most airlines allow one bag of duty-free purchases in addition to your carry-on limit. If your personal item is slightly overstuffed, moving some items into a duty-free shopping bag can sometimes bypass a strict gate agent (though use this sparingly).
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The Pillowcase Hack: A popular 2026 trend involves student a pillowcase with soft clothing. Most airlines allow a "neck pillow" or "small pillow" for comfort, and they rarely check what is inside.
Final Thoughts
In 2026, the cheapest ticket isn't always the cheapest way to travel. For a solo traveler with just a backpack, Spirit or Frontier is unbeatable. For a family of four with three suitcases, Southwest will almost always be the most economical choice.
Before you click "Buy," add your bags to the cart—the real price will finally reveal itself.
Happy travels, and pack light!