The easiest way to avoid a hassle at check-in is to double-check the airline carry-on size limits before you start packing (or better yet, before you buy your luggage).
I researched the carry-on and personal item size limits for 175 domestic and international airlines to compile the ultimate guide to carry-on luggage size limits. This is the most comprehensive list of carry-on size limits on the web.
The general guideline is that carry-ons need to be under 22 x 14 x 9 inches for domestic flights, or 21.7 x 15.7 x 9 for international flights. However, every airline sets its own luggage restrictions, and those restrictions vary quite widely.
That’s why it’s important to research the rules for the specific airlines you’re flying with. I wrote this guide to be a straightforward resource where you can easily find the size restrictions for different airlines.
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