Originally Posted by
wannaflyaway
Thanks for the warm welcome! And also for catching my mistake, I meant "non-stop" flights. Sorry about that!
Thanks also for the suggestion which works for me. Although, it would mean to know in advance all possible airports in the US receiving non-stop flights from, for example, Frankfurt. So if there is any kind of tool that querying would bring everything it would be awesome. Still what you say is good and thanks again!
If you want to find all U.S. airports with non-stop flights to FRA from the U.S., reverse-engineer the problem: Google "FRA airport wiki," and you'll find all non-stop flights from FRA to the U.S. Since those flights tend to be bi-directional, you should thereby be able to identify all flights from the U.S. to FRA. Look at the U.S. carriers appearing on the FRA airport Wikipedia page (likely to be just AA, DL, and UA) and at the German carriers (likely just Condor and Lufthansa with nonstop service to/from the U.S.).