>> Schynige Platte and Schilthorn - can we do both in one day? Stay in Lauterbrunnen. Another option is head to Zermatt at the end of the day. Is this possible?
The key to finding out what you can do in one day is to use the Swiss Timetable to plan your trips. How much travel time you are happy with, and how long you spend at each destination is up to you.
The train to Schynige Platte runs 26 May to 28 Oct 2018; the cable car to the Schilthorn is closed for maintenance from 12 November 2018 until early December. What are your travel dates?
>> Day 5 - Zermatt - Gornergrat adn Klein - can we do both in one day?
The name of the mountain is Klein Matterhorn - Little Matterhorn. Calling it Klein doesn't make any sense :-)
You can use the Swiss Timetable to find out what you can do in a day.
If you are there at the right time of the year, you can take a shortcut between Klein Matterhorn and Gornergrat (or vice versa).
>> Can we do a day from from Lauterbrunnen or should be plan to stay in Zermatt.
Personal choice :-) Use the Swiss Timetable to find out travel times.
>> If staying in Zermatt is better, what do we do with our luggage?
There are luggage lockers downstairs at Zermatt railway station.
>> Day 6 - If staying in Zermatt, go to Geneva and spend the day in Geneva - stay in Geneva. Is it possible to go to Montreaux, Chateau de Chillon adn then go to Geneva.
You can use the Swiss Timetable to plan this and see if it suits you.
>> Is it better to spend a day in Geneva?
Personal preference. I would regard any time in Geneva as a very low priority, but others would disagree.
>> Another option is, if we stay fully in Lauterbrunnen, we can go to Montreaux from there. I have read that this train ride is really good.
From Lauterbrunnen you can indeed travel on the Golden Pass route from Interlaken Ost to Montreux via Zweisimmen. This is a lovely scenic trip.
Use the Swiss Timetable to plan it timewise.
>> In which case, should we make Lauterbrunnen our base and do day trip to Zermatt.
That's a possibility, but is a choice you need to make yourself. First, find out the travel times using the Swiss Timetable.
>> Regarding travel pass, thinking of buying 8 day Swiss Travel Pass. Since we are in Jungfruah for 3 days, should we also buy Jungfrauh travel pass?
The Jungfrau Travel Pass is available between 5 May and 21 October 2018. It would not usually be cost effective to buy both passes.
There is only one way to know for sure: plan your itinerary in detail, including all trips by train, bus, boat and cable car. Then look up the full-fare cost of all these planned trips and compare the total cost of separate tickets with the cost of doing the same trips with the Swiss Travel Pass, Swiss Half Fare Card etc.
You can find fares in the Swiss Timetable.
(Use the timetable on the right with the red SBB logo)
It is important to be aware that the fare shown for any trip in the Swiss Timetable defaults to half fare, as most Swiss residents will have a Half-Fare travelcard which entitles them to this discount. Your calculations need to be based on full fares, which are double the default fare that comes up.
There is information and a spreadsheet here to help you:
www.myswissalps.com/tr ain/ticketspasses/prac tical/chooserailpass