Is this itinerary ok and which pass or none?

14/5 - Milan to Tirano to Chur on Bernina Express ( 1st class seats already reserved)
15/5 - Chur
16/5 - Glacier Express Chur to Brig ( will reserve 1st class seats)
- regional trains Brig - Spiez - Interlaken
17/5 - Interlaken
18/5 - Golden Pass Interlaken to Montreux (will reserve 1st class seats)
19/5 - Montreux
20/5 - Montreux to Lyon

This itinerary was conceived by a travel agent as part of a trip that includes France and Italy, but I'm going to organize it myself now due to the excessive cost of the travel agent's package. I was going to keep this part of the trip the same though, unless it seems not to be sensible.

We may take boat trips in Interlaken and Montreux on our non-travel days.

Is it worth buying 4 day Swiss flexi passes with this itinerary (there are 2 of us so we can get the 15% discount).

Hi Judy52,

Your itinerary looks fine to me; you've planned to do some of the most attractive rail routes in Switzerland. Taking the regional train from Brig via Kandersteg to Spiez is a good decision. Also I think the 4-day Swiss Saver Flexi Pass makes sense. Details and resellers can be found here. I would suggest to keep an eye on our website as rail pass prices change rather quickly and I expect new promotions (on top of the 15% discount) to be available from February. Perhaps you can take advantage of that, depending on where you're from.

For hotels of various price ranges close to rail stations, you may want to check the hotel pages, and specifically the one for Interlaken.