The Düsseldorf-Unterrath–Düsseldorf Airport Terminal railway is a branch line from Düsseldorf-Unterrath station on the Cologne–Duisburg line to Düsseldorf Airport Terminal station in the north of the North Rhine-Westphalian state capital of Düsseldorf in Germany.

It is also connected to the north from Düsseldorf-Unterrath Karthäuser Weg junction over a single-track electrified line.

On 27 October 1975, in preparation for the upgrading of the line between Cologne and Duisburg for the introduction of S-Bahn services, a new line from Düsseldorf-Derendorf Dp junction to Düsseldorf Airport Terminal station opened for passenger traffic.

For this purpose an existing siding had been duplicated and electrified and extended to the Terminal C building.

Due to problems with the installation and acceptance of the Skytrain at first, a bus shuttle was established.