This is a list of airlines by foundation date, founded before December 31, 1930.
The date of the first airline service may differ from the foundation date.
Bold names and a light-green background indicate that the airline is still in operation, while light-yellow indicates a disputed claim.
Avianca Still in operation Los Angeles-San Diego Air Line started service in 1925 with Ryan modified Davis-Douglas Cloudster.
For airlines founded after 1930 see Category: Airlines by year of establishment