It ran 4.2 kilometres (2.6 mi) from Aarau to Suhr, providing a connection between the Bözberg and Zofingen–Wettingen lines.

The Swiss National Railway (SNB) opened the Aarau–Suhr and Zofingen–Wettingen lines on 6 September 1877.

[2] The line passed to Swiss Federal Railways in 1902.

SBB electrified the line from Aarau to Zofingen via Suhr on 15 July 1946.

[3] SBB closed the line 11 December 2004 to permit the re-routing of the narrow gauge Menziken–Aarau–Schöftland railway line off surface streets.