How many airlines are there?
There are about 100 airlines. These airlines include the area of United States, Canada, and Mexico. There are 26 airlines in the Caribbean and Central America.
Many airlines fly out of London Heathrow Airport, so it is impossible to list all of them, but major airlines that fly out of Heathrow include British Airways, Lufthansa, SAS Scandinavian Airlines, American Airlines, TAP Portugal, Qatar Airways, Qantas, Singapore Airlines, Aegean Airlines, Air New Zealand, South African Airways, KLM and many more.