Like the railroad and the automobile, the airliner has changed the very geography of the societies it serves. Fundamentally, air transportation has helped redefine the scale of human geography by dramatically reducing the cost of distance, both in terms of time and money. The result is what the author terms the 'airborne world', meaning all those places dependent upon and transformed by relatively inexpensive air transportation. The Economic Geography of Air Transportation answers three key questions: how did air transportation develop in the century after the Wright