Airline Carry-On Size Guide
How airline cabin bag limits work, why they differ, and how to check your suitcase before you fly.
There is no single global carry-on size
Airlines publish their own cabin limits. Many European carriers use sizes near 55×40×20 cm or 55×40×23 cm. US majors often quote 22×14×9 in. Budget airlines may use a smaller free underseat bag and charge for a wheeled cabin bag.
How FitsTheBin checks a bag
We sort each bag's sides longest to shortest and compare them with the airline limit sorted the same way, so orientation does not matter. Linear (L+W+H) rules use the sum of the three sides. Expandable bags are checked closed and expanded.
Use the catalog
Browse every airline on the Airlines directory, or enter your dimensions on the homepage checker to see fits, tight fits, and failures across the full catalog.
Related: Airlines · Bags · Sizes · Data reports