Apr 11, 2018 - 1:36 AM
in reply to marietab
>> I just noticed that our hotel in Wengen has a check in time from 4pm-6pm
That's not unusual for small family-run hotels, but they will sometimes make an exception if you inform them of your arrival time. If the hotel is some distance from the station, check whether they provide pick-up and drop-off services on your days of arrival and departure.
The last connection that will get you to Wengen from Genève-Aéroport (Geneva Airport) to Wengen via the Golden Pass route leaves the airport at 17:25, so you probably won't make it, and would be travelling in the dark before you got to Spiez anyway.
In that case, you would need to take the faster, less scenic route through the flatter parts of the country.
It might be worth spending the night in Montreux and taking the Golden Pass route to Interlaken Ost the following day, then continue on normal trains to Wengen.