Here is the answer:
http://en.wikipedia.org/wiki/World%27s_largest_airlines
United Airlines, Singapore Airlines
The biggest airplane in the world Antonov-AN-225 "Mriya" belongs to a Ukrainian company "Antonov Airlines" based in Kiev, Ukraine.
US Airlines is a travel and flight company. They fly customers all over the world for purposes of both business and leisure. They are one of the biggest airline companies in the world.
Definitely American airlines! it is one of the biggest airlines in the whole world and they provide everything u need in it unlike other airlines it doesn't keep u waiting for several hours the possibility of u getting on a plane is 1 and 3!
the biggest domestic airline would probably be American airlines and the biggest domestic airliner would be the 737-800ER
Frontier Airlines
Continental Airlines? Continental Airlines? Continental Airlines?
Thomasfly is one of the world's biggest chartered airlines in the world based in the United Kingdom. They offer chartered flights all over Europe and Ireland.
Trans World Airlines was created in 1930.
Trans World Airlines ended in 2001.
Seaboard World Airlines ended in 1980.
World Atlantic Airlines was created in 2002.