Most airlines allow 22 pounds for carry-on bags, but the limit varies by carrier
The standard carry-on weight limit across major U.S. airlines is 22 pounds (10 kilograms). However, this is not universal. Some airlines set the limit at 26 pounds, while others cap it at 20 pounds or lower. Budget carriers like Spirit and Frontier often enforce stricter limits than full-service airlines. The weight that matters is what you actually pack into your bag — not the bag itself — so a lighter bag gives you more room for contents.
Weight limits exist because overhead bins have structural limits, and airlines need to prevent injuries from heavy bags falling during flight or turbulence. The limit is enforced at the gate, not at check-in, which means you could board with an overweight bag and be asked to check it at the last minute. This is worth knowing because checked bags often cost extra on budget airlines, turning a free carry-on into a paid bag.
Key Takeaways
- Most major airlines allow 22 pounds for carry-on luggage, but Spirit, Frontier, and some international carriers allow 20 pounds or less.
- Weight limits are enforced at the gate, not at check-in, so you may discover your bag is overweight when boarding.
- The weight limit applies to the contents of your bag, not the bag itself, so choosing a lightweight bag gives you more packing room.
- Budget airlines often charge $35 to $50 to check a bag at the gate if your carry-on exceeds the limit, so knowing your airline's rules before packing saves money.
- Dimension limits (usually 22 x 14 x 9 inches) are enforced more strictly than weight limits, and a bag that fits the size requirement may still be rejected for weight.
Weight limits by major U.S. airline
Here are the carry-on weight limits for airlines you are most likely to fly:
| Airline | Carry-On Weight Limit | Notes |
|---|---|---|
| American Airlines | 22 pounds | Applies to all cabin classes |
| Delta Air Lines | 22 pounds | Applies to all cabin classes |
| United Airlines | 22 pounds | Applies to all cabin classes |
| Southwest Airlines | 22 pounds | Two free carry-ons per passenger |
| JetBlue Airways | 22 pounds | Applies to all cabin classes |
| Alaska Airlines | 22 pounds | Applies to all cabin classes |
| Spirit Airlines | 20 pounds | Strictly enforced; overweight bags checked at gate |
| Frontier Airlines | 20 pounds | Strictly enforced; overweight bags checked at gate |
If you fly internationally, check your specific airline's policy before packing. European carriers like Ryanair and EasyJet often allow only 18 to 20 pounds for carry-on bags. Asian carriers vary widely — some allow 26 pounds, others 20 pounds. The airline's website will list the exact limit under "baggage policy" or "carry-on baggage".
Size limits matter as much as weight
Even if your bag weighs less than 22 pounds, it must fit the overhead bin. The standard carry-on dimension limit is 22 x 14 x 9 inches (56 x 36 x 23 centimeters). A bag that meets the weight limit but exceeds these dimensions will be rejected and checked at the gate. Some airlines measure bags at the gate using a sizer frame — a metal box that your bag must fit into without forcing.
Budget airlines enforce dimension limits more strictly than full-service carriers. Spirit and Frontier will gate-check bags that are even slightly oversized. If you are flying budget, a bag marketed as "carry-on compliant" is worth the extra cost because it guarantees you will not be stopped at the gate. Personal items (purses, small backpacks, laptop bags) are usually exempt from weight and size limits as long as they fit under the seat in front of you.
What happens if your carry-on is overweight
If your bag exceeds the weight limit, the gate agent will ask you to check it. On budget airlines, this costs $35 to $50 per bag. On full-service airlines, the first checked bag is usually free, but you lose the convenience of having your bag with you during the flight. You will not know your bag is overweight until you reach the gate, so there is no time to repack or redistribute weight to a personal item.
Some travelers try to avoid this by wearing their heaviest items (jacket, boots) onto the plane, which technically works because personal clothing does not count toward carry-on weight. However, gate agents can ask you to remove items you are wearing and weigh them separately if they suspect you are circumventing the limit. The safest approach is to weigh your packed bag at home before heading to the airport.
How to weigh your bag before the airport
A bathroom scale or kitchen scale will tell you whether your bag is under the limit. Place the scale on a flat surface, step on it alone to get your weight, then step on it while holding the bag. The difference is your bag's weight. If you do not have a scale at home, many post offices, shipping stores (UPS, FedEx), and grocery stores have scales you can use for free or a small fee.
If your bag is overweight, remove items one at a time until it reaches the limit. Heavier items like shoes, toiletries, and electronics add weight quickly. Consider packing these in a personal item instead, or checking a bag if the airline offers a free checked bag on your ticket type. On budget airlines where checked bags cost money, it may be worth buying a lighter bag or leaving items behind.
International carry-on rules differ by country
If you are flying out of the United States to another country, your outbound flight follows U.S. airline rules. However, your return flight from that country may follow different rules. European airlines typically allow 20 pounds or less. Middle Eastern carriers often allow 26 pounds. Asian airlines vary by country and carrier.
The safest approach is to check your return airline's baggage policy before you pack for the trip. If you are flying multiple airlines (for example, a connecting flight with a different carrier), each airline's rules explore to that leg of the journey. Your bag may be within limits for the first flight but overweight for the second, so know the strictest limit on your itinerary.
Frequently Asked Questions
Can I bring two carry-on bags if one is under the weight limit?
Most airlines allow one carry-on bag plus one personal item. The personal item (purse, small backpack, laptop bag) does not count toward the weight limit. Southwest is the exception — it allows two free carry-on bags plus a personal item. Check your airline's policy because some carriers count a rolling bag and a backpack as two carry-ons, not one carry-on and one personal item.
Do I have to remove my carry-on from the scale if it is weighed at the airport?
No. The scale reading is the weight of your bag plus its contents. You do not remove the bag from the scale. If the agent asks you to remove items, they are checking whether the bag itself is the problem or the contents. In most cases, if your bag weighs 22 pounds or less, you are within the limit and can board.
What if my bag is one pound over the limit?
Gate agents have some discretion, especially on full-service airlines. A bag that is one or two pounds over may be allowed if the flight is not full or if the agent is not strictly enforcing the limit that day. However, you cannot count on this. Budget airlines (Spirit, Frontier) enforce the limit strictly and will check any bag over the stated weight. The safest approach is to stay under the limit.
Does the weight limit include my personal item?
No. The carry-on weight limit applies only to your rolling bag or overhead bin bag. Your personal item (purse, laptop bag, small backpack) is separate and does not count toward the 22-pound limit. However, your personal item must still fit under the seat in front of you.
Can I pack my carry-on heavier if I pay for a premium cabin?
No. First-class and business-class passengers on most airlines have the same carry-on weight limit as economy passengers. The difference in premium cabins is usually more generous checked baggage allowances and priority boarding, not higher carry-on limits. Check your specific ticket to confirm, but weight limits are uniform across cabin classes on most carriers.