Zurich–Munich (EC).

• Now six services a day in each direction.
• The services will now be operated by ETR 610 Astoro trains.
• The journey time will be reduced to around 4 hours from December 2020. From December 2021, the journey time is set to be reduced further to 3 hours 30 minutes.

Zurich–Winterthur–St. Gallen.

• From the 2021 timetable, the IC5 St. Gallen–Zurich–Biel/Bienne–Lausanne/Genève-Aéroport and the EC Munich–St. Gallen–Zurich will provide the fast long-distance services between St. Gallen and Zurich, only stopping at Winterthur and Zürich Flughafen. 
• The journey time between St. Gallen and Zürich HB will be reduced to just 59 minutes (3 minutes less than at present). 
• At peak time (Monday-Friday mornings and evenings), more IC5s will operate. This means there will be half-hourly fast ICs at times of high demand in one direction.
• The IC1 will take the path of the current IC5 and will therefore stop in Zürich Oerlikon, Wil, Uzwil, Flawil and Gossau SG. That means that these stations will now have a direct connection to Bern.

St. Gallen–Zurich–Bern.

• The direct IC1 connection from St. Gallen to Bern will take 18 minutes longer.
• To use the fast St. Gallen–Bern direct connection taking 2 hours, passengers will have to change at Zürich Löwenstrasse (on the same platform).
• There will now be a total of 24 fast connections between St. Gallen–Zürich HB–Bern (as opposed to 14 connections at present).
• IC1 services will be operated mostly by long-distance double-deckers, while the InterCity tilting trains will continue to be used on IC5 services.

Zurich–Sargans–Chur.

• Daily IC3 services will be extended by one hour in the evenings in both directions (Zürich HB dep. 22:38, Chur dep. 21:08 will now run daily, not just at weekends).
• The IC 934 which departs from Chur at 17:37 will run daily rather than just at weekends, as previously.
• On weekends in winter, two additional IC trains will run from Zurich to Chur on Saturday mornings (Zürich HB dep. 06:07 and 09:07) and two additional IC trains will run from Chur to Zurich on Sunday evenings to bring people back(Chur dep. 15:37 and 19:37).
• The departure and arrival times will be moved by one or two minutes for services in both directions.

Zurich–Arth-Goldau–Lugano and EC Zurich–Milan.

• Now 10 direct services a day from Zurich to Milan. The journey time between Zurich and Milan will be reduced to 3 hours 17 minutes. EC trains will now depart Zurich at 33 minutes past the hours.
• The Zurich–Lugano journey time will be reduced to less than 2 hours.
• IC and IR trains from Zurich on the Gotthard route will now depart at 5 minutes past the hour. Every even hour, an SOB service will run straight to Ticino via the Gotthard panorama route, with a connection to an IC service through the Gotthard Base Tunnel at Arth-Goldau. Every odd hour, there will be a direct service from Zurich through the Gotthard Base Tunnel with a connection to a service running on the Gotthard mountain route.
• Half-hourly services to Ticino will be offered at peak times and at times of high demand in one direction.
• Between Zurich and Arth-Goldau, half-hourly services will be provided every weekday, and additional services will be provided at weekends.

Zurich–Zug–Lucerne.

• The IR70 to Luzern will now depart Zürich HB later, at 10 minutes past the hour. It will no longer stop in Thalwil (passengers travelling from Thalwil towards Luzern should take the IR75 running the other half hour or the S24 with a change in Zug). The journey time between Luzern and Zürich HB by IR70 will be reduced to just 41 minutes, a reduction in travel time of approx. 10%.
• The IR70 will run in combination with the IR13. That means there will be a new half-hourly direct connection between Luzern/Zug and Flughafen Zürich.

Zürcher S-Bahn.

S11.

• The S11 will now stop in Othmarsingen every half hour.
• The S11 will additionally stop in Rämismühle-Zell between Winterthur and Wila.
• The S11 will continue beyond Dietikon to Aarau every half hour in the morning and evening at the weekend (services were previously only hourly).

Andelfingen–Marthalen(–Dachsen).

The Andelfingen–Marthalen(–Dachsen) route will be closed to services from 29 July to 23 August 2021 due to construction work. This affects S-Bahn routes S12, S24 and S33. Rail replacement buses will operate.

RegioExpress Herisau–St. Gallen–Konstanz.

An additional service in each direction will be provided between St. Gallen and Konstanz in the evening. From Monday to Sunday, the last RegioExpress services will depart Konstanz at 21:09 and St. Gallen at 21:15.

S1 Wil–St. Gallen.

The S1 will stop now also in St. Gallen Bruggen. This will improve the connection to Fürstenland, St. Gallen and towards St. Fiden–Wittenbach–Romanshorn. The S1 will give St. Gallen Bruggen continuous half-hourly services. 

S15 Frauenfeld–Wil.

An additional late service in both directions will be provided. From Monday to Sunday, the S15 will also depart Wil at 23:42 and Frauenfeld at 00:26.

S6 Rapperswil–Ziegelbrücke–Schwanden (–Linthal) including rail replacement services between Schwanden and Linthal.

SOB will run the S6 Rapperswil–Ziegelbrücke–Schwanden (–Linthal) route, including rail replacement services between Schwanden and Linthal. SBB has transferred its concession for this route to SOB.