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.

The easiest way to avoid a hassle at check-in is to double-check the airline carry-on size limits before you start packing ...

What Is Allowed in a Carry-on Bag? As all air travelers know ... If you must travel with a battery of this size, you should speak with a TSA agent and your airline before going through security.

Most major U.S. airlines agree on the limits of a carry-on’s size (22 inches long by 14 inches wide by 9 inches high, to be exact). All the luggage on our list meets those requirements ...