The proper choice of luggage depends on many factors such as: how long your trips are; how many stops you plan on having; and, whether you normally bring back more than you left with (such as in purchasing souvenirs, etc). For domestic (and most international) flights, airline restrictions allow you to bring one carry-on item on board. In most instances you will also be able to bring along a personal item, such as a laptop or purse (but not both). 5 things to consider before buying luggage are:

Size
Carry on luggage on a plane must fit into the overhead compartment, or under the seat in front of you. Generally, maximum dimensions can be no more than 45 inches. (22x14x9 in). Some airlines have stricter standards. Checked luggage does not have these limitations.

Portability
Luggage with wheels is very popular because it is easy to pull along a smooth airport concourse, but the wheels and handle weigh 4 - 5lbs. and take at least 2 inches from the usable space. It