Carry-on weight limits vary by airline, but most allow 22 to 26 pounds
The weight limit for carry-on luggage depends on which airline you fly. Most major U.S. carriers — including American, Delta, United, and Southwest — permit 22 pounds (10 kilograms) for a standard carry-on bag. Some airlines, particularly budget carriers and international airlines, set the limit at 26 pounds (12 kilograms) or lower at 15 pounds (7 kilograms). A few airlines do not enforce weight limits for carry-on bags at all, only size restrictions.
The airline's website or your booking confirmation will show the exact limit for your flight. If you are unsure, contact the airline directly before you pack — it takes five minutes and saves the hassle of repacking at the gate. Weight limits are enforced more strictly on smaller regional flights and international routes than on domestic flights, where gate agents often overlook a bag that is slightly over.
Key Takeaways
- Most U.S. airlines allow 22 pounds for carry-on luggage, though some permit 26 pounds and budget carriers may set limits as low as 15 pounds.
- The weight limit applies to your personal item (purse, backpack, laptop bag) and your rolling carry-on bag combined, not each separately.
- Airlines weigh carry-on bags more often on international flights and regional routes than on domestic flights between major hubs.
- If your bag exceeds the limit, you can move items to checked luggage, mail items ahead, or buy an additional checked bag rather than pay an overweight fee.
How airlines measure and enforce weight limits
Most airlines use a scale at the gate or check-in counter to weigh your carry-on bag. The agent places your bag on the scale, and if it exceeds the airline's limit, you are asked to either remove items, move the bag to checked luggage, or pay a fee. On some flights, particularly those with tight connections or full overhead bins, agents weigh every carry-on. On others, they weigh bags only if they look oversized.
The weight limit usually covers both your carry-on roller bag and your personal item (backpack, purse, or laptop bag) combined. A few airlines count them separately — your personal item might be unlimited while your roller bag has the 22-pound cap. Check your airline's policy to know which applies to you.
International flights and flights on regional carriers (smaller planes with less overhead space) enforce weight limits more consistently than domestic flights on large aircraft. If you are flying to Europe, Asia, or on a regional airline, assume your bag will be weighed and pack accordingly.
What happens if your carry-on bag is too heavy
If your bag exceeds the weight limit at the gate, you have several options. The fastest is to remove items and place them in your personal item or a seat pocket. If you have a second carry-on allowance (some airlines permit two), you can redistribute weight between bags. If you have no room to move items, the agent will ask you to check the bag, which usually costs nothing if you have not already checked a bag.
Some airlines charge a fee — typically $25 to $50 — if you refuse to check an overweight carry-on. Paying the fee is rarely worth it. Instead, move items to checked luggage or, if you are traveling light, mail items to your destination before you leave home. Shipping a small box via USPS Priority Mail often costs less than an overweight fee and arrives within two to three days.
How to pack within the weight limit
The easiest way to stay under the limit is to weigh your bag at home before you leave. Use a bathroom scale or a kitchen scale — place your empty bag on the scale, note the weight, then add items until you reach the airline's limit. Most carry-on bags themselves weigh 5 to 8 pounds, leaving you 14 to 17 pounds for clothing and other items on a 22-pound limit.
Pack heavier items (shoes, toiletries, electronics) in your checked bag if you have one. Carry lightweight items in your roller bag: socks, underwear, lightweight shirts, and a sweater. Keep your personal item for essentials you need during the flight — medications, phone charger, a book, and a change of clothes in case your checked bag is delayed.
If you are traveling for more than a week or carrying items that are difficult to pack light, consider checking a bag instead of fighting the carry-on limit. A checked bag typically costs $30 to $40 on domestic flights and is included free on most international flights, which often makes it the better choice than paying overweight fees or shipping items separately.
Carry-on limits for specific airlines
Here are the carry-on weight limits for major U.S. carriers. These limits change occasionally, so confirm with the airline before your flight.
| Airline | Carry-on Weight Limit | Notes |
|---|---|---|
| American Airlines | 22 pounds (10 kg) | Applies to both roller bag and personal item combined |
| Delta Air Lines | 22 pounds (10 kg) | Applies to both roller bag and personal item combined |
| United Airlines | 22 pounds (10 kg) | Applies to both roller bag and personal item combined |
| Southwest Airlines | No weight limit | Size limit only; two free carry-on bags permitted |
| Alaska Airlines | 22 pounds (10 kg) | Applies to both roller bag and personal item combined |
| Frontier Airlines | 26 pounds (12 kg) | Personal item free; roller bag requires paid add-on |
| Spirit Airlines | 26 pounds (12 kg) | Personal item free; roller bag requires paid add-on |
Budget carriers like Frontier and Spirit allow heavier carry-on bags but charge for the privilege of bringing a roller bag at all. Their personal item (backpack or purse) is free and has no weight limit, so if you are flying with them, pack everything into a backpack instead of a roller bag to avoid the add-on fee.
International airline carry-on limits
International airlines often set lower carry-on limits than U.S. carriers. Many European and Asian airlines allow only 15 pounds (7 kilograms) for carry-on luggage. Some permit 22 pounds but count your personal item separately and limit it to 11 pounds. A few, particularly Middle Eastern carriers, allow 26 pounds or more.
If you are flying internationally, check the specific airline's website before packing. International flights enforce weight limits more strictly than domestic flights, and gate agents will weigh your bag. If you exceed the limit, you will be required to check the bag or pay a fee — there is no flexibility.
Frequently Asked Questions
Does my personal item count toward the carry-on weight limit?
On most airlines, yes — your personal item (purse, backpack, or laptop bag) and your roller bag are weighed together and must stay under the airline's limit. A few airlines count them separately, so your personal item might be unlimited while your roller bag is capped at 22 pounds. Check your airline's policy to be sure.
What if I have a connecting flight with a different airline?
Each airline's weight limit applies to that airline's flight. If you connect from American to United, your bag must meet American's limit for the first flight and United's limit for the second. In practice, if your bag passes the first airline's scale, it will almost certainly pass the second. The issue arises only if you are connecting between a U.S. carrier and an international carrier with a much lower limit.
Can I bring a full-size roller bag as a personal item instead?
No. A personal item is defined by size, not weight — it must fit under the seat in front of you. A full-size roller bag does not fit under a seat, so it counts as your carry-on bag and is subject to the weight limit. If you want to avoid the weight limit, use a backpack or soft-sided bag as your personal item instead.
Do airlines weigh carry-on bags on every flight?
No. On domestic flights between major hubs, agents often skip weighing carry-on bags unless the bag looks obviously oversized. On regional flights, international flights, and flights with full overhead bins, weighing is more common. Budget carriers weigh bags more often than full-service airlines. If you are unsure, pack as if your bag will be weighed.
Is there a way to avoid the weight limit altogether?
Southwest Airlines does not enforce a weight limit for carry-on bags, only a size limit. If weight is a concern and you have the option to fly Southwest, that is your best choice. Otherwise, your only option is to check a bag instead of carrying it on.