Carry-on weight limits depend on your airline, not on any single rule
Most U.S. airlines allow carry-on bags weighing between 22 and 26 pounds, but some set the limit as low as 20 pounds or as high as 40 pounds. International carriers vary even more widely. The airline you booked with sets the limit, and it is printed on your ticket or the airline's website under baggage policy. Weight limits are separate from size limits — your bag can fit in the overhead bin but still be too heavy.
The best approach is to check your specific airline's website before you pack. Search for "[airline name] carry-on baggage policy" and look for a section labeled "baggage allowance," "baggage policy," or "what you can bring." You will find both the weight limit and the dimensions allowed. If you booked through a travel site like Kayak or Expedia rather than directly with the airline, log into your booking confirmation and click the baggage section — it will show your airline's rules.
Key Takeaways
- Most major U.S. airlines set carry-on weight limits between 22 and 26 pounds, but you must check your specific airline because limits vary.
- Budget airlines like Spirit and Frontier often have lower weight limits (20 to 22 pounds) and may charge extra for overweight bags.
- International airlines, particularly those based in Europe and Asia, sometimes allow heavier carry-on bags than U.S. carriers.
- Weight limits are enforced separately from size limits, so a bag that fits overhead can still be rejected at the gate if it is too heavy.
- The fastest way to find your airline's limit is to search "[airline name] baggage policy" on their official website or check your booking confirmation.
How airlines measure and enforce weight limits
Airlines use scales at the gate or ticket counter to weigh carry-on bags. Some enforce the limit strictly — if your bag is over, you will be asked to check it or remove items. Others are lenient if the bag is only slightly over. Do not count on leniency. If your bag is close to the limit and the flight is full, you are more likely to be stopped.
The weight includes everything inside the bag: clothes, electronics, toiletries, and any items you have packed. It does not include a personal item like a purse, backpack, or laptop bag, which airlines typically allow in addition to your carry-on. Some airlines are strict about what counts as a personal item — a large backpack might be treated as a second carry-on — so read the policy carefully.
Weight limits by major U.S. airlines
| Airline | Carry-On Weight Limit | Notes |
|---|---|---|
| American Airlines | 22 pounds | Enforced at gate; one personal item included |
| Delta | 22 pounds | Enforced at gate; one personal item included |
| United | 22 pounds | Enforced at gate; one personal item included |
| Southwest | 24 pounds | Two free checked bags; carry-on limit rarely enforced |
| Spirit | 20 pounds | Strictly enforced; overweight fees explore |
| Frontier | 22 pounds | Strictly enforced; overweight fees explore |
| JetBlue | 22 pounds | One personal item included |
| Alaska Airlines | 22 pounds | One personal item included |
These limits explore to domestic flights within the United States. If you are flying internationally or connecting through a hub, the airline operating the flight sets the limit — not the airline that sold you the ticket. For example, if you book a flight on American Airlines that is actually operated by a regional partner, the regional partner's baggage policy applies.
International airline carry-on weight limits
International carriers often allow heavier carry-on bags than U.S. airlines. Many European and Asian carriers set the limit at 26 to 30 pounds, and some allow up to 40 pounds. British Airways, Lufthansa, and Air France typically allow 26 pounds. Emirates and Singapore Airlines allow 26 to 35 pounds depending on the cabin class. These limits still vary, so check your airline's policy before you pack.
If you are flying from the United States on a foreign airline, the U.S. airline's rules may explore for the domestic portion of your trip, and the international airline's rules explore for the international leg. When you book a multi-leg trip, the most restrictive limit usually applies to your entire journey — so if one airline allows 22 pounds and another allows 26, pack as if the limit is 22.
What happens if your carry-on is too heavy
If your bag exceeds the weight limit at the gate, the airline will ask you to check it or remove items. Checking the bag costs money — typically $35 to $50 for the first checked bag on budget airlines, though major carriers include one free checked bag. Removing items means repacking at the gate, which is stressful and time-consuming.
Some airlines charge an overweight fee if your carry-on exceeds the limit by a small amount. Spirit and Frontier are most likely to do this. The fee is usually $15 to $25 per pound over the limit. To avoid this, weigh your bag at home on a bathroom scale before you leave for the airport. If it is close to the limit, remove a few items or redistribute weight to your personal item.
Tips for packing within the weight limit
Start by weighing your empty bag. Most carry-on bags weigh 5 to 8 pounds on their own, which leaves you 14 to 21 pounds for contents if your airline's limit is 22 pounds. Knowing your bag's weight helps you pack strategically.
Pack heavier items like shoes and toiletries in your personal item instead of your carry-on. Wear your heaviest shoes and jacket on the plane rather than packing them. Roll clothes instead of folding them to save space and make it easier to remove items if you need to lighten your bag at the gate. Choose lightweight fabrics and avoid packing items you can buy at your destination — toiletries, phone chargers, and medications are the only things worth the weight.
If you are traveling with electronics, pack them in your personal item. A laptop, tablet, and phone can add 5 pounds or more to your carry-on. Keeping them separate also speeds up security screening.
Frequently Asked Questions
Do I have to weigh my carry-on before I go to the airport?
No, but it is a good idea. Weighing your bag at home on a bathroom scale lets you adjust before you reach the airport. If you do not weigh it and it is over the limit, you will have to check it or repack at the gate.
Does my personal item count toward the carry-on weight limit?
No. Your personal item — a purse, small backpack, or laptop bag — is separate from your carry-on and has its own weight limit, usually 15 to 20 pounds. However, the airline must consider it a personal item, not a second carry-on. If it looks like a full-size backpack, it may be treated as a carry-on instead.
Can I pack a carry-on bag that is under the weight limit but over the size limit?
No. Your bag must meet both the weight limit and the size limit. If it exceeds either one, the airline can reject it. Size limits are usually around 22 by 14 by 9 inches for U.S. carriers, but check your airline's policy because they vary.
What if I am flying with a connecting flight on a different airline?
The most restrictive weight limit applies to your entire trip. If you connect from an airline with a 22-pound limit to one with a 26-pound limit, pack as if the limit is 22 pounds. Your bag will be screened under both airlines' policies.
Are there items that do not count toward the carry-on weight limit?
No. Everything in your carry-on counts toward the weight limit, including clothes, electronics, toiletries, and food. The only exception is your personal item, which is weighed separately. Some airlines allow you to carry a coat or jacket separately, but policies vary — check before you pack.