The S2 is a railway service of the S-Bahn Zürich on the Zürcher Verkehrsverbund (ZVV) transportation network, and is one of the network's services connecting the canton of Zürich with the cantons of Schwyz and St. Gallen.

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S2
An S2 train (left) with an S5 train (middle) at Pfäffikon SZ in 2010
Overview
Service type	S-Bahn service
Locale	Zürich S-Bahn
Current operator(s)	Swiss Federal Railways
Route
Termini	Zürich Airport Unterterzen
Stops	15
Average journey time	1 hour 18 minutes
Service frequency	Every 30 minutes
Line(s) used	Zürich–Winterthur line Lake Zürich left-bank line Ziegelbrücke–Sargans line
Technical
Rolling stock	RABe 514 class
Route map Legend time (h) S24 to Effretikon 0:00 Zürich Airport S16 S24 S7 to Effretikon S3 S9 S15 to Oberglatt S6 S21 to Regensdorf-Watt S8 S14 S19 to Wallisellen 0:05 Zürich Oerlikon S3 S6 S7 S9 S15 S16 S21 to Zürich Hardbrücke S24 to Zürich Wipkingen Weinberg Tunnel (4.8 km) S3 S5 S6 S7 S9 S11 S12 S15 S16 S20 S23 to Zürich Stadelhofen 0:11 Zürich HB[lower-alpha 1] S4 S10 from Zürich HB SZU to Zürich Selnau S24 to Zürich Wipkingen S3 S5 S6 S7 S9 S11 S12 S15 S16 S21 to Zürich Hardbrücke S14 S19 to Zürich Altstetten 0:13 Zürich Wiedikon S8 S24 Ulmberg Tunnel (848 m) 0:18 Zürich Enge S8 S24 Enge Tunnel (903 m) 0:25 Thalwil S8 S24 S24 to Zug 0:29 Horgen (Ferry to Meilen) S8 0:36 Wädenswil S8 S13 S25 S13 to Einsiedeln 0:39 Richterswil S8 VAE S40 to Biberbrugg 0:45 Pfäffikon SZ VAE S5 S8 S25 S40 VAE S5 S40 to Rapperswil 0:48 Altendorf 0:51 Lachen S25 0:57 Siebnen-Wangen S25 S27 S6 S17 to Uznach 1:05 Ziegelbrücke S6 S17 S25 S27 S6 S25 to Linthal 1:18 Unterterzen S17 S17 to Sargans [1][2] This diagram: view talk edit Zürich HB tracks (Gleis) from left to right: 41–44 / 3–18 (surface) / 31–34 / 21–22 (SZU).

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At Zürich HB, trains of the S2 service usually depart from underground tracks (Gleis) 31–34 (Löwenstrasse station).

• S2 Zürich Flughafen – Oerlikon – Zürich HB – Thalwil – Pfäffikon SZ – Ziegelbrücke (– Unterterzen)
  Stops between Zürich Enge and Ziegelbrücke only in Thalwil, Horgen, Wädenswil, Richterswil, Pfäffikon SZ, Altendorf, Lachen and Siebnen-Wangen. Weekend services extended non-stop from Ziegelbrücke to Unterterzen at hourly intervals.

The service links Zurich Airport with Ziegelbrücke, a village and railway junction on the border between the cantons of St. Gallen and Glarus. On weekends, every other train continues to Unterterzen. From the airport, the service runs via Oerlikon and the Weinberg Tunnel to Zürich Hauptbahnhof. From Zürich Hauptbahnhof, the service uses the Lake Zürich left-bank railway line to Ziegelbrücke, stopping only at selected stations.^[4]

• Zürich Flughafen
• Zürich Oerlikon
• Zürich Hauptbahnhof
• Zürich Wiedikon
• Zürich Enge
• Thalwil
• Horgen
• Wädenswil
• Richterswil
• Pfäffikon SZ
• Altendorf
• Lachen
• Siebnen-Wangen
• Ziegelbrücke
• Unterterzen

As of the December 2022 timetable change,^[update] all services are operated with RABe 514 class trains.^[5]

The train frequency is usually 30 minutes and the trip takes 65 minutes between Zürich Airport and Ziegelbrücke, and an additional 13 minutes from Ziegelbrücke to Unterterzen.^[4]

Originally, the S2 operated between Zürich airport and Ziegelbrücke. With the 15 June 2014 timetable change (opening of the Weinberg Tunnel), the route was lengthened to Unterterzen and services to stations between Siebnen-Wangen and Ziegelbrücke were suspended.^[6] The S27 (March shuttle), which is not part of the Zürich S-Bahn network (or the St. Gallen S-Bahn network), was introduced, replacing the S2 between Ziegelbrücke and Siebnen-Wangen (operates only during peak-hour).

• Rail transport in Switzerland
• Trams in Zürich