Hi

What exactly do you have? Swiss Pass is just an “empty” ticket holder in switzerland.

Are you talking about interrail/eurail one country pass for switzerland?

to reserve in excellence class, you need a first class ticket, and the reservation itself is over chf 400… you get the reservation in glacier express’ web page. just “buy a ticket” and in the lat step you can select interrail/eurail as reduction

This will answer your questions : https://www.glacierexpress.ch/en/offers/excellence-class

It indeed costs 470 CHF and need to be booked well in advance. You must have a valid 1st class ticket/pass too (or pay for an upgrade). It's probably a really good experience but I would never spend that much !

As alternatives :

- regular Glacier Express carriages (1st/2nd class) : 49 CHF mandatory reservation (food not included). Book well in advabce too.

- hourly regional trains on the same route : no supplement, same views, less crowded !

The choice is easily made in my opinion. :)

The country pass. When do you pay the extra for excellence class ? Thanks

Do you have a 1st or 2nd class pass ?

Here is the reservation page : https://shop.glacierexpress.ch/gex_en

The upgrade to 1st class (outside any reservation) costs 50 CHF (day upgrade). See : https://www.sbb.ch/en/tickets-offers/tickets/point-to-point-tickets-switzerland/class-upgrades-supersaver-class-upgrades/class-upgrade.html