Zürich Hauptbahnhof
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.