Carry-on bag size limits: how to check yours
Carry-on bag size limits differ by airline and fare, so here is how to check yours, measure your bag and avoid gate fees, with no made-up numbers.
Zeina Saidi3 min read
What is the carry-on bag size limit? There is no single number. Each airline sets its own, and the limit can change with the route, the fare and the plane.
The method
- Open your booking and find the baggage section on the airline's site.
- Look for "cabin bag", "carry-on" and "personal item" separately. They have different limits.
- Note the size and the weight, if there is a weight limit.
- Measure your bag at home with a tape measure. Include the wheels, handles and any outside pockets.
- Weigh it when packed. A bathroom scale works: weigh yourself holding the bag, then without it.
If the airline lists a limit in centimeters and inches, trust the one for your region. Do not use a number from a forum or a blog, including this one.
Why it matters
Low-cost airlines are often strict, and fees for bags at the gate can cost more than the fare. Some basic fares include only a small personal item. Check your fare type before you pack.
Ruling: if the bag is close to the limit, assume it will be checked and plan for it. A bag that fits the sizer with room to spare is safer than one that "should" fit.
The exception
The same airline can have different limits on different routes or on codeshare flights. If you fly with two airlines, check both. For help choosing a bag, see backpack or wheeled bag, and for packing for it, one bag travel for beginners.
Personal item vs cabin bag
Many airlines separate these two. The personal item goes under the seat in front. The cabin bag goes in the locker above. Some fares include only the personal item, so a wheeled suitcase may cost extra at the gate.
Worked example: you have a small backpack and a wheeled carry-on. On a basic fare, only the backpack may be allowed free. On a standard fare, both may be. Check the fare name on your booking, not just the airline.
How to avoid gate trouble
- Pack so the bag is not bulging. A bag that is full to the zip may not fit the sizer.
- Put heavy items in the personal item if the cabin bag has a weight limit.
- Arrive at the gate in good time. The overhead lockers fill up.
- Know that staff have the final say on the day.
Keep proof
Take a screenshot of the airline's baggage page and keep it on your phone. If there is a dispute, it helps. Do not argue, but show it politely.
More to read
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