Total length: 12.5 km (underground) - 18 stations

Large-profile line with ~100 m long platforms (6-car trains of F and H stock).

Line U9 operates every 5 minutes during off-peak daytime service, and every 4 minutes during peak hours.

Line U9 was opened shortly before the Berlin Wall was erected in 1961. It runs entirely on former West Berlin territory and is an important north-south axis bypassing the historic city centre. It is completely underground, and thanks to its straight alignment one of Berlin's fastest lines.

28-08-1961: Leopoldplatz - Spichernstraße
29-01-1971: Spichernstraße - Walther-Schreiber-Platz
30-09-1974: Walther-Schreiber-Platz - Rathaus Steglitz
30-04-1976: Leopoldplatz - Osloer Straße

30-04-1976

Convenient 2-level interchange station, with line U9 stopping on the upper level.

30-04-1976

28-08-1961

Convenient 2-level interchange station, with line U9 stopping on the lower level.

28-08-1961

28-08-1961

28-08-1961

28-08-1961

28-08-1961

28-08-1961

Convenient 2-level interchange station, with line U9 stopping on the lower level.

28-08-1961

Located below the busy intersection of Kurfürstendamm and Joachimsthaler Straße in the City West, with transfer to line U1 provided from the northern end of the platform.

28-08-1961

Transfer to line U3 is via a short tunnel at the western end of the platform.

29-01-1971

29-01-1971

Convenient 2-level interchange station with line U9 stopping on the upper level.

29-01-1971

Side platforms, with separate access to S-Bahn platform.

29-01-1971

29-01-1971

30-09-1974

2-level station, in provision for cross-platform interchange with a once-planned line U10; southbound on the lower level, northbound on the upper.

30-09-1974

'temporary' use of U10 platform; the actual U9 side platforms are hidden behind a wall in the mezzanine, for a once-planned extension to Lankwitz.