We are flying home from Zurich (to NYC) through Dusseldorf next summer. There are two options for flights, one with 1.5 hrs between connections and one with 7 hrs.... Obviously we would prefer the 1.5 hrs, but want to make sure we are leaving enough time if we will need to go through customs in Dusseldorf. Experience and suggestions would be welcome. Airlines are ticketed by one carrier, but flight to NYC is on partner carrier.
Thank you!!