Mar 6, 2017 - 8:30 AM
in reply to Macymok
April wouldn't be particularly busy no - but I always recommend reservations on panoramic trains. :)
Reservations can me made here, and schedules can be searched for here. The Glacier Express train is listed as GEX in the scheduled options and the Golden Pass is 'Golden Pass Panoramic' or 'MOB panoramic'.
The Glacier Express runs from Chur to Zermatt.
If you want to do the entire Glacier Express route then Interlaken to Chur is about 3.5 hours, then the Glacier Express to Zermatt is about 5-6 hours, followed by Zermatt back to Interlaken at 2.5 hours - If you want to do this then you often have to overnight in Chur as the Glacier Express departs at 08:30 or 10:30 usually (depending on the date).
A quicker option is Interlaken to Visp (1 hour) and the the Glacier Express to Zermatt (1 hour) but as you see you are not doing a lot of the Glacier Express route.