Thanks for your input. You brought up some good points to consider.
Sorry for any confusion. Here is a brief clarification of our short trip for late June 2020:
We arrive ZRH on Sunday at 14:25 & depart Thursday at 7:40 in the morning. A total of 4 nights and we must stay in Zurich or someplace close to the airport Wednesday night for the Thursday morning flight. We will be in the Alps 3 nights staying in Wengen arriving Sunday evening (with two full days and ½ day Wednesday). We have a tentative plan for two easy to easy/moderate hikes using the local cable cars & trains to access the trails.
Here is how I calculated the transportation rates.
Sunday - Lauterbrunnen-Wengen single journey: CHF 6,80
Monday - Wengen-Männlichen single journey: CHF 23 -> Hike back to Wengen via Kleine Scheidegg
Tuesday - Wengen-Grütschalp single journey: CHF 15,80 -> Hike to Murren Next: Mürren-Stechelberg single journey: CHF 11,20 -> Hike the valley floor (family selfie at each of the 72 waterfalls) back to Lauterbrunnen Next: Lauterbrunnen-Wengen single journey: CHF 6,80
Wednesday - Wengen-Lauterbrunnen single journey: CHF 6,80 Drive back to Zurich with a possible stop in Lucerne with a few hours parking cost
This adds up to CHF 70.40 *3 adults plus CHF 30 for Junior Travel Card (Total CHF 241,20). (math in my previous posts did not included every leg from/to Wengen)
For the car, we already have a cancelable reservation:
Pick up ZRH airport Sunday - Return Zurich HB Wednesday $180.09 USD = CHF 176
Car type – Volvo V40 or similar (mpg 22 city & 29 highway) -> Fuel cost approx. CHF 50 for <200 miles roundtrip
3 days parking Lauterbrunnen CHF 42,00
Total car cost: approximately CHF 268.00
Our family decided not to go to Jungfraujoch (Top of Europe) because it appeared too expensive. Are we making a big mistake to come so close then not make the trip to the top? Is it worth it? Also, with our limited time, we are skipping Grindelwald and that side of the mountain.
Because we plan to not take full advantage of all the public transportation in the Alps, single leg full price journeys (with CHF 30 Junior Card) seems the best choice for our family. This may not be the best for other travelers who have more time and plan to travel more by train & cable car than us.
We may want to consider a larger car to give the girls a little more room in the back seat. Our car type is too small for 4 adults with regular size luggage. We travel light. Each family member has the same carry-on roller suitcase (small enough for the Euro discount airlines)
Curious for our hike back to Wengen via Kleine Scheidegg how easy is it to catch the train at Wengernalp or Allmend in case the girls get tired or dad’s knees ache or dad gets blisters? The stations appear fairly small. Are there ticket machines or ticket offices?
Incidentally, we may decide to buy the Saver Day Pass tickets after all. My understanding each ticket is for a specific train & time. How much time does a typical traveler need to add from plane to train at ZRH airport? We land at 14:25 (assuming flight is on time coming from Vienna). What is a comfortable time to catch the train?
Our trip is still 10 months away. We are locked into our flights only. We have plenty of time to cancel plans and consider all options and suggestions.