Best option with or without a half price discount card or daypass Paris-Wengen/Wengen-Rome
My Daughter (age 19) and I (Canadians) will be travelling to Switzerland in May. We will be travelling Paris to Wengen, and 4 days later Wengen to Rome. Our daytrips will include Interlaken, Lauterbrunnan and Murren. Is it worth getting a half fare discount card or daypasses? I don’t know how to calculate the portions of the longer trips that would be included in such passes.