It is! The majority of those flights are used for the purposes of travel, mostly because it's far more efficient to use large boats for the purposes of cargo, rather than aircrafts. The first heavier-than-air fixed wing aircraft was pioneered over 100 years ago, and in that time, travelling by air has only kept making strides in becoming both faster and more affordable.

I've never flown before, myself, but, for the purposes of the trip I'm planning, I'll have to make at least a few flights, as well as ferry trips and train rides...