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Air Travel (flv 2.6MB)
Travel class on an airplane is usually split into a two, three or four class model. 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. The differences between premium economy and economy are quite significant, but the cost is not greatly altered by purchasing a Premium Economy ticket. The price difference between an economy class ticket and a first class ticket, however, are often extreme. Most air travel starts and ends at a commercial airport.