Lets say I'm travelling through Switzerland on the sbb and have purchased a ticket from point A thru point B to point C. By the time I get to point B I realize the weather has turned and now I want to deviate to point D.
Can I get a refund/exchange on the unused portion of the original A-C ticket? How does that work?
You are talking about tickets you bought the day of travel, specifically in Switzerland, right? (I hope so because there is no advantage to buying p2p tickets in advance on the web for travel within Switzerland, unless you are doing a scenic train and want reserved seats). You chould be able to go to the ticket window at station B, show them your ticket to C, and say you want to go to D instead, and they will adjust the price and issue the ticket. But maybe that won't work if destination C is the Jungfraujoch; they may not give refunds on the extra payment. We did something like this right on the train. The route went A to B to C then back to B before going to D. We bought tickets for A-B- D but when we got to B we realized that we would have to get off and stand in the cold and rain (it wasn't really a station) and wait for the train to return from C. So I asked the conductor if we could just pay and stay on the train to C and back. She worked it out with her hand-held ticket device and we paid the difference. (Seemed kind of silly but that is the way it works in Switzerland, you pay by the kilometer of travel and you don't get extra for free.)
Thanks, I was hoping it would be easy. Do the conductors on the local Jungfrau region trains have the same hand-held ticket machines?