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	13
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

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, Glarus and St. Gallen.

Route

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.^[1]

On its route, the service stops at the following stations:

• Zürich Flughafen
• Zürich Oerlikon
• Zürich Hauptbahnhof
• Zürich Wiedikon
• Zürich Enge
• Thalwil
• Horgen
• Wädenswil
• Richterswil
• Pfäffikon SZ
• Altendorf
• Lachen
• Siebnen-Wangen
• Ziegelbrücke (terminus of every other weekend train and all weekday trains)
• Unterterzen (terminus of every other weekend train)

Rolling stock

An RABe 514 prepares to depart Horgen in 2018 with an S2 service for Ziegelbrücke

As of 2021^[update], all services are operated with RABe 514 class trains.^[2]

Scheduling

The train frequency is usually 30 minutes and the trip takes 65 minutes between Zürich Flughafen and Ziegelbrücke.^[1]