I am trying to estimate how long it will take to get on a train once I arrive in Luxembourg. Does anyone know how long it usually takes to get through customs?

Customs will take as long as it takes you to walk through the door as long as you don't get stopped for a search.

Immigration and passport control are what I think you mean. It depends how many planes land etc but my experience is that they are very efficient so it should take too long. It's a small airport.

Thank you!