>> transfer to Lucerne ... Day 4: Explore the town and go for river cruise and some hiking nearby.
Cruises are on the Vierwaldstättersee (Lake Lucerne).
>> Day 6: Take a train from Lucerne to lauterburnnen for jungfrau trip
Starting from Lauterbrunnen is one option, and you could return via Grindelwald. The other option is to go up via Grindelwald and return via Wengen/Lauterbrunnen. If you take the second option, I would recommend getting off in Wengen on the way down and going to the lookout for a beautiful view over the Lauterbrunnen Valley.
The lookout is about a 5-10-minute walk from Wengen station. Here are the directions:
From the station, head left up the main street lined with shops and hotels (Dorfstrasse), past the Hotel Silberhorn on the right, Männlichen cable car on the right, Hotel Bernerhof on the left, and uphill a bit past the Hotel Schönegg on the right and a chemist on the left. At the top of the hill, you will see a path on the left leading to the Swiss Protestant Church, where there is a lookout and seats. I have attached a map and a photo of the view.
>> Day 7: Take a train to saas fee and go for some hiking and rest
You can't get a train to Saas-Fee, only a PostBus (free with Swiss Travel Pass). You get the train to Brig or Visp and transfer to the Saas-Fee bus there.
If you would like to know what this bus trip is like, you could read my trip report under the heading Meiringen to Saas-Fee on the following page:
I have also written trip reports about Saas-Fee and some mountain visits I did while there, if you are interested:
There is more information about Saas-Fee here:
>> 2. Is it advisable to take train directly from saas fee to Zurich airport?
When you arrive in Saas-Fee, ask at the PostBus ticket office (in the bus terminal) whether you need a reservation for the bus back to Visp on your day of departure. Reservations for the trip back to Visp used to be compulsory a few years ago, but I think they have increased the frequency of services since then, so reservations are probably no longer needed. When I was there in September last year, they said I didn't need one. However, as you have a flight to catch, I would recommend checking to be sure you can catch your preferred bus.
>> 3. Please advise if I can add some places worth visit during my transfers ... lugano to saas fee.
I have a suggestion for a scenic route (but not for stopovers, as it is a very long trip on its own). If you can find a departure time that suits you, a nice way of travelling from Lugano to Saas-Fee is on the Centovalli scenic railway and then by PostBus over the Simplon Pass.
The route is:
- Train Lugano to Locarno (change at Giubiasco)
- Train Locarno to Domodossola (Centovalli Express scenic route)
- PostBus Domodossola to Brig over the Simplon Pass
It would take 1 to 1.5 hours longer than the default/fastest route suggested by the Swiss Timetable.
To get this scenic route in the timetable, put "From Lugano" "To Saas-Fee" "Via Simplon Dorf". Avoid any connections that involve a change from the bus to the car train at Iselle, Stazione/Iselle di Trasquera.
If you are interested, you can read a report about my trip along this route (in the opposite direction) under the heading Saas-Fee to Locarno on the following page: