Total length: 19.9 km (17 km underground) - 29 stations

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

Line U5 operates every 5 minutes through the day.

Line U6 was the first large-profile line when it opened in 1923. It runs along Friedrichstraße, Berlin's major north-south axis in the city centre. Initially the former Line C had two southern branches, but the eastern branch from Mehringdamm to Britz-Süd was transferred to the new line U7 in 1966.

As with line U8, the stations in the city centre were skipped between 1961 and 1990, with the exception of Friedrichstraße, which remained open to provide transfer to the West Berlin S-Bahn routes or allow certain pedestrians to cross the border.

In the 1950s and 1960s, line U6 was extended at both ends to become Berlin's busiest north-south line. The northern extension to Tegel includes a 3-station elevated section.

30-01-1923: Hallesches Tor - Stettiner Bahnhof (now Naturkundemuseum)
08-03-1923: Stettiner Bahnhof - Seestraße
19-04-1924: Hallesches Tor - Belle-Alliance-Straße (now Mehringdamm) [- Gneisenaustraße U7]
14-02-1926: Mehringdamm - Kreuzberg (now Platz der Luftbrücke)
10-09-1927: Kreuzberg - Flughafen (now Paradestraße)
22-12-1929: Flughafen - Tempelhof
03-05-1956: Seestraße - Kurt-Schumacher-Platz
31-05-1958: Kurt-Schumacher-Platz - Tegel (now Alt-Tegel)
28-02-1966: Tempelhof - Alt-Mariendorf

31-05-1958

31-05-1958

31-05-1958

Station on an embankment

31-05-1958

Station on an embankment

31-05-1958

Station on an embankment

03-05-1956

03-05-1956

03-05-1956

08-03-1923

Station with southbound island platform, and northbound side platform (not connected); access to train depot.

08-03-1923; rebuilt 1960

Side platforms to provide convenient interchange with line U9, which stops on the lower level.

08-03-1923

Access to the S-Bahn from the southern end of the platform via a short walk at street level.

08-03-1923

08-03-1923

Closed 1961-1990

30-01-1923

Closed 1961-1990

1923: 'Stettiner Bahnhof';
1951: 'Nordbahnhof';
1991- 13 Dec 2009:
'Zinnowitzer Straße'

30-01-1923

Closed 1961-1990

30-01-1923

30-01-1923

Closed 1961-1990

To be replaced with a new station called 'Unter den Linden' to provide transfer to the future line U5.

30-01-1923

Closed 1961-1990

Long and narrow transfer corridor between lines U2 and U6, known as the 'mouse tunnel'.

30-01-1923

30-01-1923

19-04-1924, rebuilt 1966

14-02-1926

10-09-1927

22-12-1929

28-02-1966

28-02-1966

28-02-1966

Station located below road bridge across the Teltow Canal.

28-02-1966

28-02-1966