I want to travel from Zermatt to Wasserauen on September 18. I have purchased the Swiss Travel Pass Flex, but I do not understand how it will work. This is the itinerary I found on sbb.ch:
- Train 902 - Depart Zermatt 8:52/Arrive Chur 14:24
- Train 928 - Depart Chur 14:37/Arrive Sargans 14:55
- Train S 4 11453 - Depart Sargans 15:02/Arrive Herisau 16:23
- Train S 23 1163 - Depart Herisau 16:28/Arrive Wasserauen 17:12
Can I reserve these tickets online? If so, how do I use my Swiss Travel Pass Flex to do so? Or do I need to purchase something additional?
Thank you.