Carry-on weight limits vary by airline, but most allow 22 to 26 pounds

The weight your carry-on bag can be depends entirely on which airline you are flying. There is no single rule across the industry. Most major U.S. carriers — including American, Delta, United, and Southwest — permit carry-on bags up to 22 pounds (10 kilograms). Some airlines, including Alaska and JetBlue, allow up to 24 pounds. A few carriers go as high as 26 pounds. Budget airlines like Spirit and Frontier often set lower limits, sometimes 20 pounds or less.

The airline's website or your booking confirmation will state the exact limit for your flight. If you are unsure, call the airline directly or check during online check-in, which usually displays baggage rules. The weight limit applies to the bag itself plus everything inside it — there is no separate allowance for the bag's empty weight.

Airlines measure carry-on weight at check-in or the gate. If your bag is overweight, you will be asked to move items to a checked bag, pay an overweight fee (typically $25 to $100), or leave items behind. Some airlines weigh bags randomly; others weigh every single one. Budget carriers tend to enforce limits more strictly than full-service airlines.

Key Takeaways

  • Most major U.S. airlines allow carry-on bags between 22 and 26 pounds, but the exact limit depends on your specific airline and flight.
  • The weight limit includes the bag itself plus all contents — you cannot separate the two for a higher allowance.
  • Budget airlines enforce weight limits more strictly and often set lower limits than traditional carriers.
  • You can find your airline's carry-on weight limit on their website, your booking confirmation, or by calling customer service before you pack.
  • If your bag is overweight at the airport, you may have to pay a fee, check the bag instead, or remove items on the spot.

How airlines measure and enforce carry-on weight

Airlines use digital scales at the gate or check-in counter to weigh carry-on bags. The process is straightforward: you place your bag on the scale, and if it exceeds the airline's limit, the agent will flag it. Some airlines weigh bags as a standard procedure for every passenger; others spot-check randomly. Budget carriers like Spirit, Frontier, and Allegiant almost always weigh carry-on bags because overweight fees are a significant revenue source for them.

If your bag is overweight, you have three options: pay the overweight fee (usually $25 to $100 depending on the airline), move items to a checked bag if you have room in your checked baggage allowance, or remove items and leave them behind or ship them separately. The fee structure varies — some airlines charge a flat rate; others charge per pound over the limit. Check your airline's website for their specific overweight policy before you travel.

Full-service carriers like American, Delta, and United tend to be more lenient than budget airlines. They may not weigh every bag, and agents sometimes allow a few pounds over the limit without charging a fee. However, you should never count on this — pack within the stated limit to avoid surprises at the airport.

Size and weight work together — you need to meet both

Carry-on bags have two restrictions: size and weight. Your bag must fit within the airline's size limits (usually 22 by 14 by 9 inches for U.S. carriers) and weigh no more than the weight limit. A bag that is the right size but too heavy will still be rejected. Conversely, a light bag that is too large will also be turned away.

This matters because a small, dense bag — like a hard-sided roller packed tightly — can easily exceed the weight limit even though it looks reasonable. A large, loosely packed soft-sided bag might stay under the weight limit but exceed the size limit. You need to consider both constraints when packing.

If you are unsure whether your bag meets both requirements, weigh it at home on a bathroom scale and measure it with a tape measure. Most airlines publish their exact size and weight limits online. Some airports have sizing frames at the gate so you can check dimensions, but there is no way to check weight except with a scale.

What items add the most weight to carry-on bags

Electronics and liquids are the heaviest items most people pack in carry-on bags. A laptop weighs 3 to 5 pounds depending on the model. A tablet adds 1 to 2 pounds. A full water bottle or other liquid container can weigh several pounds. Shoes, books, and toiletries in solid form also add up quickly.

If you are close to the weight limit, consider these moves: pack liquids and gels in your checked bag instead (they are restricted in carry-on anyway — 3.4 ounces per container, 1 quart total). Leave the laptop in your checked bag if you do not need it during the flight. Wear your heaviest shoes during the flight instead of packing them. Choose a lightweight carry-on bag itself — soft-sided bags typically weigh less than hard-sided ones.

Clothing is deceptively heavy when packed tightly. Rolling clothes instead of folding them saves space but not weight. If you are traveling for more than a few days, you may need to check a bag regardless of carry-on weight limits, straightforward because the volume of items becomes impractical to fit in a small bag.

Carry-on weight limits for international flights

International airlines often have different carry-on weight limits than U.S. carriers. European airlines like Lufthansa, Air France, and British Airways typically allow 26 pounds (12 kilograms) for economy passengers. Some allow up to 35 pounds. Asian carriers vary widely — some permit 22 pounds, others 26 or more.

If you are flying internationally, check your specific airline's baggage policy on their website. The limit may differ depending on which airline operates the flight, even if you booked through a partner airline. Budget international carriers, like Ryanair and EasyJet in Europe, enforce strict weight limits and charge high fees for overweight bags.

When flying on a connecting flight with multiple airlines, each airline's carry-on rules explore to the segment you fly with them. If you connect from a U.S. carrier to an international carrier, your bag must meet both airlines' requirements. The stricter limit applies — if one airline allows 22 pounds and the other allows 26, you should pack to 22 pounds to be safe.

Tips for staying under the weight limit

Start by choosing a lightweight carry-on bag. Soft-sided roller bags typically weigh 5 to 7 pounds empty, while hard-sided bags weigh 7 to 10 pounds. A backpack or duffel bag can weigh as little as 2 to 3 pounds. The lighter your bag itself, the more weight you have left for contents.

Pack strategically: wear your heaviest items (coat, boots, jeans) during travel instead of packing them. Put heavy items like shoes at the bottom of the bag. Use packing cubes to compress clothing and maximize space, which can help you avoid overpacking. Limit yourself to one pair of shoes plus the pair you are wearing.

Weigh your packed bag at home before you leave for the airport. Use a bathroom scale or a luggage scale (available for $10 to $30 online). If you are over the limit, remove items or redistribute weight to a checked bag. This takes five minutes at home and saves you stress and potential fees at the airport.

What happens if your bag is overweight at the gate

If your carry-on is overweight when you reach the gate, the agent will inform you before you board. At this point, you have limited options. You can pay the overweight fee if the airline charges one. You can check the bag if you have not already checked a bag and your airline allows a free checked bag. You can remove items and leave them behind, ship them, or ask a traveling companion to add them to their bag if there is room.

Some airlines will not allow you to board until the bag is either checked or brought under the weight limit. Others will allow you to gate-check the bag (store it in the cargo hold) if the overhead bins are full, which solves the problem but means you will not have access to your bag during the flight.

The best strategy is to avoid this situation entirely by weighing your bag before you leave home and confirming your airline's weight limit in advance. If you are traveling with items you are unsure about, pack them in a way that allows you to remove them quickly if needed.

Frequently Asked Questions

Do airlines weigh carry-on bags for every passenger?

Budget airlines like Spirit and Frontier weigh most or all carry-on bags. Full-service carriers like American, Delta, and United may weigh bags randomly or not at all, depending on the flight and agent. You should assume your bag will be weighed and pack accordingly, since enforcement is unpredictable.

Can I pack a carry-on bag heavier than the limit if I pay a fee?

No. The weight limit is a hard limit for safety and aircraft balance reasons. If your bag exceeds the limit, you must either check it, remove items, or pay to have it checked. You cannot pay extra to carry it on overweight.

Does the weight limit include my personal item like a purse or backpack?

Most airlines allow one carry-on bag plus one personal item (purse, small backpack, laptop bag) at no extra charge. The weight limit usually applies only to the carry-on bag itself, not the personal item. However, check your airline's policy, as some budget carriers count both toward a single weight allowance.

What if I am flying with a connecting flight on a different airline?

Each airline's carry-on rules explore to the segment you fly with them. If you connect between airlines, your bag must meet both airlines' size and weight limits. Pack to the stricter of the two limits to avoid problems on either leg of your journey.

Can I add weight to my carry-on by wearing heavy items like a coat?

Yes. Items you are wearing do not count toward the carry-on weight limit. Wearing a heavy coat, boots, or a backpack during boarding is a common strategy to stay under the limit. Just remember that you will be carrying this weight through the airport, so balance comfort with practicality.