Line 3
Kolsås Line / Østensjø Line — Kolsås ↔ Mortensrud. 27 stations.
About Line 3
Line 3—also known as the Kolsås Line / Østensjø Line—runs from Kolsås at one end to Mortensrud at the other, connecting 27 stations. The line crosses the central shared corridor between Majorstuen and Tøyen, where all five lines meet.
Stations
Oslo’s subway system began as the Holmenkollbanen in 1898 and was Northern Europe’s first electric suburban railway. Line 3 was integrated into the current subway system in 1928.
Frequently Asked Questions
Line 3 is one of the five subway lines in Oslo. It runs from Kolsås to Mortensrud and serves 27 stations.
A round-trip journey from Kolsås to Mortensrud takes about 39 minutes, depending on the time of day and transfers in the city center.
The first train on Line 3 departs around 5:30 a.m., and the last train around 1:10 a.m. Trains run every 4–7 minutes during rush hour.
In the central transit corridor (Majorstuen, Nationaltheatret, Stortinget, Jernbanetorget, Grønland, and Tøyen), you can transfer between all five subway lines, as well as buses and trams.