Interstate Air Transportation

The transportation of passengers or property by aircraft as a common carrier for compensation, or the transportation of mail by aircraft--

(A) between a place in--

(i) a State, territory, or possession of the United States and a place in the District of Columbia or another State, territory, or possession of the United States;

(ii) Hawaii and another place in Hawaii through the airspace over a place outside Hawaii;

(iii) the District of Columbia and another place in the District of Columbia; or

(iv) a territory or possession of the United States and another place in the same territory or possession; and

(B) when any part of the transportation is by aircraft.

Source: U.S. Code.