S17 (St. Gallen S-Bahn)

The S17 is a railway service of the St. Gallen S-Bahn that provides hourly service between Sargans and Rapperswil, connecting stations in the cantons of St. Gallen and Glarus. Südostbahn (SOB), a private company primarily owned by the federal government and the canton of St. Gallen, operates the service.

S17
S17 passes by Walensee
Overview
First service	10 December 2023 (2023-12-10)
Current operator(s)	Südostbahn
Route
Termini	Sargans Rapperswil
Stops	14
Distance travelled	59.2 kilometres (36.8 mi)
Average journey time	55 minutes
Service frequency	Hourly
Line(s) used	Ziegelbrücke–Sargans railway line Rapperswil–Ziegelbrücke railway line
Route map km S5 S40 to Pfäffikon SZ 59.4 Rapperswil S5 S7 S15 S40 S4 S6 S7 to Zürich HB S5 S15 to Rüti ZH 57.3 Blumenau S6 Jona Bollingen (closed) 49.3 Schmerikon S6 46.5 Uznach S4 S6 S4 to Wattwil Steinenbach 43.4 Benken S6 37.1 Schänis S6 S2 S25 S27 to Siebnen-Wangen 34.3 Ziegelbrücke S2 S25 S6 S27 S25 S6 to Schwanden St. Gallen Glarus (Linth canal) Weesen (closed) Escher Canal (Linth) Kerenzerberg tunnel (3,96 km) 24.5 Mühlehorn Glarus St. Gallen 21.2 Murg (ferry to Quinten) 18.1 Unterterzen (aerial lift to Flumserberg) S2 Mols (closed) Bommerstein tunnel (453 m) Seez 13.5 Walenstadt 9.7 Flums 2.6 Mels to Buchs SG 0.2 Sargans S4 S12 S4 to Buchs SG S12 to Chur

On its journey, the S17 passes three disused railway stations: Bollingen, Weesen and Mols.

Operations

The S17 operates hourly between Sargans and Rapperswil, using the Ziegelbrücke–Sargans and Rapperswil–Ziegelbrücke railway lines. The S6 also operates between Rapperswil and Ziegelbrücke, combining with the S17 for half-hourly service, with calls at every station. Between Uznach and Rapperswil, the S17 and S6 are additionally supported by the S4 and IR Voralpen-Express, both of which do not call at intermediate stations.

The three hours long Alpstein round trip (until December 2023 offered by the former S4 circle line), is still possible by combining the S4 and S17 services. At Sargans, the S17 continues as the S4 in direction of travel (and the S4 continues as S17 in the other direction), so that no change of trains is required; however, passengers do need to change trains either at Uznach or Rapperswil for the complete round trip.

Route

S17 Rapperswil – Uznach – Ziegelbrücke – Sargans

• Sargans
• Mels
• Flums
• Walenstadt
• Unterterzen
• Murg
• Mühlehorn
• Ziegelbrücke
• Schänis
• Benken
• Uznach
• Schmerikon
• Blumenau
• Rapperswil

History

See also: S4 (St. Gallen S-Bahn) § History

Prior to the 10 December 2023 timetable change, service over the Ziegelbrücke–Sargans railway line was provided by the S4, which operated in a bidirectional circular fashion. The expansion to dual track between Uznach and Schmerikon (constructed between 2021 and 2023) on the Rapperswil–Ziegelbrücke railway line permitted expanded service between Rapperswil and Uznach. The S4 was rerouted to run between Sargans and Rapperswil via St. Gallen, while Sargans to Rapperswil via Ziegelbrücke became the new S17.