I have to question the logic of attempting to fit in the Glacier Express from a base in Interlaken. I recommend trying to avoid being taken in by the hyperbole surrounding the Glacier Express brand. – see my ‘mythbuster’ below. But the salient points are that the Glacier Express doesn’t suit all itineraries and shouldn’t necessarily be part of an itinerary ‘just because it exists’
The Brig – Andermatt section of the Glacier express is not the most scenic section of the Glacier Express route, which lies west of Andermatt towards Chur. The Andermatt – Chur section of the Glacier Express contains three of the six ‘best bits’ of the Glacier Express.
A better alternative might be to take the bus over the spectacular Grimsel Pass to Oberwald where you can pick up any MGB train to Andermatt
http://www.fahrplanfelder.ch/fileadmin/fap_pdf_fields/2022/31.161.pdf
Glacier Express mythbuster
Take a moment to understand the Glacier Express concept. It requires careful thought as it is not the only way to see the Swiss Alps!
Neither Luzern nor Interlaken /Jungfrau area are a good base from which to go and travel on the Glacier Express. The Glacier Express runs East – West across the southern edge of Switzerland, and Luzern and Interlaken are to the north.
The modern day Glacier Express brand is extremely well (some might say far far too well) marketed to overseas tourists, but that masks some facts, the most important one being that it doesn’t go past any glaciers! Geographically it runs East – West across the southern extremity of Switzerland, so does not fit in to all Swiss holiday itineraries. Just because the train exists doesn’t mean it is necessary to travel on it – there are dozens of other ways to see the same or similar Swiss alpine scenery.
The Glacier Express suits organised tours that rush you to Zermatt, then put you on the Glacier Express all day, then rush you off from St Moritz to somewhere else. But for independent tourists, there are a plenty of regular trains on these and all the other Swiss railways, so there are a zillion other sights to see in Switzerland which are ‘not’ on the Glacier Express!
If you already have lots of mountains and mountain peaks in your planned itinerary there is little point in adding the Glacier Express trip
The Glacier Express trains are special trains on the Rhaetische Bahn (RhB) and Matterhorn Gotthard Bahn (MGB) railway company lines which run in addition to normal ordinary service trains. The ‘panoramic’ coaches on these trains require a reservation or supplementary fare to be paid in addition to the normal fare. In all cases ordinary trains can be travelled on on the RhB/MGB network without paying any additional fare.
In all cases if you choose (or find yourself on) an ordinary train you won’t miss the scenery as all Swiss train carriages on these lines have large windows giving good views.
The Glacier Express started as a single train once a day each way many years ago, running slightly (but not much) faster than the regular trains and conveying a restaurant car for the wealthy to travel between the two ‘elite’ resorts of Zermatt and St Moritz.
The Glacier Express trains now are such a money spinner that they operate as ‘exclusive’ trains on otherwise ‘normal’ railway; ie the Rhaetische Bahn (RhB) and Matterhorn Gotthard Bahn (MGB) railway company lines which run in addition to normal ordinary service trains. The ‘panoramic’ coaches on these trains require a reservation or supplementary fare to be paid in addition to the normal fare. In all cases ordinary trains can be travelled on on the RhB/MGB network without paying any additional fare.