How big can a carry on bag be?

Question

How big can a carry on bag be?

Answer 1

The standard carry on luggage rules are 22” X 14” X 9” for a total of 45”. Again, these carry on luggage dimensions vary both by airline and shape of the bag. Even if your carry on luggage doesn’t exceed the allowed dimensions, the airline can make you prove that the bag will fit by putting it in a box, and if it won’t fit, your luggage will be checked.

Answer 2

It varies between airlines. The airlines never used to do anything about over sized carry ons, or too many carry ons - they are more strict on their policies now.

Check with the airlines your flying with.

United Airlines - 9 x 14 x 22 in/22 x 35 x 55 cm