I'm looking into airfare right now on Google Flights from LAX to Dusseldorf roundtrip via Frankfurt Airport. You would fly from LAX to Frankfurt, and then take the train to Dusseldorf.
Do you collect any luggage that you might have checked in at Frankfurt, or do you pick it up from some counter at the train station in Dusseldorf?
If I decide on the way to Germany that I don't want to go to Dusseldorf and "throwaway" the Frankfurt to Dusseldorf train ticket, does the returning flight get canceled?
This would all be booked on United's website (more expensive on Luftansa's)
Thanks