How can I get a listing of all airlines that run service out of KLAX for example? I can’t seem to find a method to do that.
For LAX, go to lawa.org/LAXAirlines.aspx
For other airports, locate their web page.
You may or may not get the freight carriers.
You may also not get the charter carriers that operate frequently at an airport.
You may also get an outdated list. As an example, LAX still shows NWA flying there.
For passenger airlines at least, the wikipedia pages are fairly (I’d say 98%) accurate.
Walk a day of the scheduled flights for LAX using the Scheduled method.