Airline Baggage Size & Weight Limits (2026 Guide): Carry-On & Checked Bag Rules Explained

Quick Reference: All Bag Types at a Glance

Before the detailed breakdowns, here is the standard that applies to the majority of economy-class travelers on full-service airlines. Budget carriers are stricter — see the per-airline tables below for exact specifications.

Carry-On Baggage: Size & Weight Limits by Airline

Standard carry-on dimensions: 22 × 14 × 9 inches (56 × 36 × 23 cm). This is the size most full-service US airlines publish, and it is a useful benchmark — but it is not universal. Southwest allows a noticeably larger bag. Spirit's carry-on allowance requires a paid upgrade on most fares. And international carriers almost all enforce a weight limit that US carriers ignore.

⚠️ Measuring correctly: Always measure your bag at its absolute largest points — handles extended, external pockets included, wheels from ground to top. The published dimensions include everything. Many bags marketed as "carry-on approved" exceed one airline's limit even if they pass another's.

⚠️ Weight limits — the international trap: Most major US domestic carriers (American, Delta, United, JetBlue, Alaska) publish no maximum weight for carry-on bags — provided you can lift it yourself. International carriers are different. British Airways, Lufthansa, Emirates, Qatar, Air Canada, and virtually every European budget airline strictly enforce carry-on weight limits of 7–10 kg (15–22 lbs). A carry-on weighed at the gate that exceeds the limit is checked and fees apply. If you fly international, weigh your carry-on.

Personal Item Rules: What Qualifies and What Doesn't

A personal item is the smaller free bag every passenger is allowed — it goes under the seat in front of you, not in the overhead bin. On virtually every airline worldwide, the personal item is included free even on the cheapest basic economy or budget fares.

Standard personal item dimensions: 18 × 14 × 8 inches (45 × 35 × 20 cm). Not every airline publishes exact dimensions — some simply say "must fit under seat" — but this measurement fits under the seat on all major aircraft types.

✅ Items that typically qualify as a personal item: purse, handbag, small backpack (20L or under), laptop bag, camera bag, soft tote bag, small duffel (collapsed), diaper bag.

⛔ Items that do NOT qualify: full-size travel backpack (40L+), carry-on suitcase of any kind, full-size wheeled duffel, large shopping bags with items, any bag visibly larger than the seat pocket.

Basic Economy warning: On American, Delta, United, and JetBlue "basic" fares, the carry-on bag is either prohibited or requires a gate-check fee. Only the personal item is included free. This is the most commonly misunderstood fare restriction — read the fine print before booking.

Items that never count against your allowance on virtually all airlines: coats and jackets, food purchased after security, assistive devices (canes, walkers, wheelchairs), safety seats and strollers (gate-checked free), medical devices including CPAP machines.

Checked Baggage: Weight Limits, Size Limits & Fees

Standard economy checked bag limits: 62 linear inches total (length + width + height = 157–158 cm) and 50 lbs (23 kg). These limits apply at the vast majority of US, European, and international full-service carriers in economy class.

⚠️ Critical: A bag that is BOTH overweight AND oversized incurs BOTH fees simultaneously. A 70-lb, 70-linear-inch bag on American could cost $200+ in overweight fees plus $150+ in oversized fees — over $350 extra. Avoid this by weighing and measuring every bag before the airport.

Domestic vs International: US domestic flights typically charge $30–45 for the first checked bag. Many international routes — especially on long-haul full-service carriers — include one or two checked bags free in the base fare, particularly in Premium Economy, Business, or First class. Always check your specific booking confirmation.

Oversized Bag Fees

Linear inches = length + width + height combined. A standard suitcase at 28 × 20 × 12 inches = 60 linear inches — within the 62-inch limit. Add two inches anywhere and you are in oversized territory.

Checked Bag Allowances by Airline

First bag fees shown are for economy class on domestic routes, purchased online. Airport counter fees are typically $5–20 higher. International routes may include free bags — check your booking confirmation.

International vs Domestic Baggage Rules: Key Differences

The rules change significantly when you cross an international border — sometimes making travel cheaper (more free bags), sometimes more expensive (weight-enforced carry-ons), and always more complex.

Carry-on weight enforcement: On US domestic flights, carry-on bags are almost never weighed. The only test is whether you can lift it and whether it physically fits. On international flights, especially on European, Middle Eastern, and Asian carriers, carry-on bags are actively weighed at check-in and sometimes at the gate. A 25-lb carry-on that flew JFK→LAX without issue will be pulled aside at LHR.

Checked bag allowances: US domestic routes almost universally charge for the first checked bag (except Southwest). Many international routes — particularly transatlantic and transpacific flights in economy — include one or two free checked bags in the ticket price. This is especially true on legacy international carriers (British Airways, Lufthansa, Singapore Airlines, Emirates, Air France). Read your booking confirmation carefully.

Piece vs weight system: North American airlines use the "piece concept" — you get a set number of bags, each with a maximum weight. Many international carriers historically used the "weight concept" — a total weight allowance shared across all bags (e.g., 46 kg / 101 lbs total across two bags). Most major carriers now use the piece system, but some still use weight for certain routes. Confirm which applies to your ticket.

Connecting flights: When your itinerary combines airlines or routes with different policies, the most restrictive policy generally applies to all your bags. A Spirit carry-on allowance (paid extra) may not be honored if you connect to a codeshare partner with stricter limits. Book itineraries on one airline when possible to avoid confusion.

Pro Tips for International Baggage

• Weigh your carry-on before international flights — budget 15 minutes to redistribute if needed.
• Wear your heaviest clothing items (boots, jeans, heavy jacket) on the plane to reduce bag weight.
• Ship non-essential heavy items home rather than paying overweight fees on the return leg.
• Check whether your route uses the "piece" or "weight" concept — it affects your strategy.
• Purchase checked bags online or through the airline app before check-in — airport counter fees are always higher.
• If connecting through a hub with a European budget carrier, budget extra time for a carry-on weight check at the gate.

US Airlines Master Comparison

All measurements include handles and wheels. Carry-on weight "N/A" means no published enforcement for domestic flights. Fees shown are standard economy, online purchase. ✅ = best in category.

European Budget Airlines Comparison

European budget carriers have some of the strictest baggage policies in the world. Base fares typically include only a small personal item — everything else is an add-on. Carry-on dimensions are in centimetres in Europe; inches conversions are approximate.

International Full-Service Airlines Comparison

⚠️ Middle Eastern and Gulf carriers often weigh carry-on bags at the gate in addition to check-in — even on routes operated by codeshare partners. Budget extra time and bag budget if flying Emirates, Qatar, or Etihad.

How to Avoid Baggage Fees: Six Proven Strategies

Baggage Fee Comparison: What You Actually Pay

First bag fees shown for standard economy on domestic US routes, paid online in advance. Gate fees are always higher.

TSA Liquids & Carry-On Security Rules (2026)

The 3-1-1 rule for carry-on liquids: 3.4 oz (100 ml) maximum per container / 1 quart-sized clear zip-top bag / 1 bag per passenger. The quart bag must be removed from your carry-on and placed in the security bin separately.

2026 updates: TSA PreCheck ($78 for 5 years; $70 renewal) allows shoes and light jackets to stay on, electronics and liquids to stay in your bag, and use of dedicated faster lanes. CLEAR ($189/year) expedites identity verification but does not change the screening process itself. PreCheck is typically the better value for frequent travelers.

• Allowed in carry-on: Toiletries and liquids under 3.4 oz in the quart bag, solid makeup and deodorant, medications (including liquids in larger quantities with documentation), baby formula and food, breast milk, electronics including laptops and tablets, phone chargers and power banks (must be in carry-on — not checked), books and snacks, keys, medical devices including CPAP machines.
• NOT allowed in carry-on: Liquids over 3.4 oz (unless medically exempt), firearms and ammunition (checked only, with proper declaration), sharp objects over 4 inches (scissors, knives, razors), sporting goods (bats, clubs, sticks), tools over 7 inches, flammable items (lighter fluid, aerosols over 3.4 oz), self-defense sprays.
• Electronics rule: Laptops and devices larger than a smartphone must still be removed from carry-on bags and placed in a separate bin at standard screening lanes (not PreCheck). Charge devices before travel — TSA officers may ask you to power them on.
• Power banks in checked bags: PROHIBITED. Lithium batteries in power banks must travel in carry-on baggage where crew can respond to a fire. There are no exceptions — airlines enforce this strictly.

Eight Common Baggage Mistakes (and How to Fix Each)

Pre-Flight Baggage Checklist

• ✅ Weigh checked bag at home — target 48 lbs (22 kg) maximum.
• ✅ Measure carry-on at its largest points including wheels and handles.
• ✅ Confirm your carry-on fits your specific airline's dimensions.
• ✅ Confirm carry-on weight is within limit (international flights especially).
• ✅ Verify personal item fits under-seat dimensions (approx. 18 × 14 × 8 in).
• ✅ Remove and bag all liquids for security (3.4 oz / 100 ml or under).
• ✅ Move power bank to carry-on — remove from checked bag.
• ✅ Pre-purchase any bag fees online before leaving for the airport.

Policy Changes & Data Accuracy Notice

Airline baggage policies change. Fee increases, fare class restructuring, new basic economy restrictions, and updated carry-on size limits can all shift without widespread notice. This guide is updated annually — but verify any specification directly with your airline before travel.

What most commonly changes: first and second bag fees (airlines adjust these frequently, often raising them), basic economy carry-on restrictions (carriers are continually tightening these), carry-on size limits (especially at budget carriers), weight limits on international routes, and credit card benefits (card products change and co-brand agreements are renegotiated).

How to verify before you fly: Check your airline's official baggage policy page directly (search "[airline name] baggage" — the official page is usually first). Review your booking confirmation email — it lists your specific fare class's included bags. If in doubt, call the airline's customer service at least 48 hours before departure.