The Neumünster Flensburg Railway is part of the Jutland line, the main north–south rail link through Schleswig-Holstein, Germany. Together with the line to Husum, which diverges in Jübek, and the line to Kiel, which diverges in Rendsburg, it also serves as an important east–west axis between Kiel and the Marsh Railway on the west coast. It consists of several sections that were parts of the first railways in the current territory of Germany.

Flensburg station is the main station of the town of Flensburg in the German state of Schleswig-Holstein. The station is located some distance from the city centre in the Südstadt district in southern Flensburg, just south of the Innenstadt district.