It is also a five-minute walk from the Finchley Road & Frognal station on the London Overground's Mildmay line, and this is marked as an official out-of-station interchange.

By the mid-1930s, the Metropolitan line was suffering from congestion on its main routes from north-west London, caused by the limited capacity of its tracks between Finchley Road and Baker Street stations.

To alleviate this congestion new sections of deep tube tunnels were bored between Finchley Road and Baker Street to carry some of the traffic from the Stanmore branch and stations south of Wembley Park.

[8] Finchley Road station is served by Jubilee and Metropolitan line services of the London Underground.

The Metropolitan line uses platforms 1 & 4 and offers services to the north-west of London and certain stations in the home counties.