Right now there are no direct flights from the U.S. to Cologne.
The duration of the flight depends on your departure airport. Here are some examples:
The durations indicated correspond to the shortest flights found on these routes.
Right now, the airline that operates flights between the U.S. and Cologne is British Airways.
The cheapest departure airport on average is: John F. Kennedy International Airport.
Comparison among airports in the U.S.
Renting a car in Cologne costs on average:
British Airways
Eurowings
Pegasus Airlines
Ryanair
SunExpress