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Air travel is a form of travel in vehicles such as airplanes, helicopters, hot air balloons, blimps, gliders, hang gliding, parachuting, or anything else that can sustain flight. Use of air travel has greatly increased in recent decades - worldwide it doubled between the mid-1980s and the year 2000.
Domestic and international flights
Air travel can be separated into two general classifications: national/domestic and international flights. Flights from one point to another within the same country are called domestic flights. Flights from a point in one country to a point within a different country are known as international flights.
Travel class on an airplane is usually split into a two, three or four class model sevens. US Domestic flights usually have two classes: Economy Class and a Domestic First Class partitioned into cabins. International flights may have up to four classes: Economy Class; Premium Economy; Business Class or Club Class; and First Class.
Most air travel starts and ends at a commercial airport. The typical procedure is check-in; border control; airport security baggage and passenger check before entering the gate; boarding; flying; and pick-up of luggage and - limited to international flights - another border control at the host country's border.
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- Chasing the Sun - History of commercial aviation, from PBS
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