Carry-on luggage size restrictions vary by airline-here's how to tell if your suitcase, backpack, or duffle bag is small enough to bring as a carry-on.

underseat luggage is subject to size and shape requirements. However, unlike most of the things people fly with—nearly all of which are precisely designed for airplane use—almost any small bag ...

On some airplanes, it may even be small enough to fit under the seat ... but given its larger size this bag doesn't fit in the overhead compartment on multiple planes (especially regional jets).

Ryanair has announce a major rule change set to take effect this summer. Here's three important policies passengers need to ...