RolandP Hello Phiembeemie96 Except for certain PE trains (Glacier Express, GEX), there is no seat reservation needed. Please see our guide about seat reservations to know more about the topic: https://community.sbbswiss.org/blog/23887-demystifying-seat-reservations-on-swiss-trains-a-comprehensive-guide Let us know if you have got more questions. Kind regards, Roland