Oct 27, 2017 - 7:16 PM
in reply to sarath
Luzern-brienz Brienz-Interlaken by boat
It is not clear where you prpose to be sleeping on the night of Day 1.
I agree with Rockoyster. Including the Rhine Falls or other towns along the Rhine will dilute the best part of your trip. You'll enjoy the Interlaken Jungfrau region + Luzern more if you concentrate on them.
Luzern is only one hour by train from Zürich airport, so you might finish your trip in Luzern then head to the airport.
Or, perhaps stay all nights in Interlaken, and make it you base. On some days go into the valley and up to the mountain villages (Wengen/Mürren/Lauterbrunnen and more- Kleine Scheidegg, Jungfraujoch. Those trips take some time, because they are mountain railways. The time table will help you understand those times:
From Interlaken, Luzern is a tolerable day trip...it has good rail connections. One hour and 51 minutes, once per hour, but you arrive in the heart of Luzern.