Hi andrev
Thank you for your reply.
No, the validity of a point-to-point ticket cannot be extended.
If there is a specific via printed on the ticket, this ticket is only valid passing through tihs specific via, you cannot get to your destination travelling through somewhere else.
If you have any more question, or in order to get a specific answer to your tickets, please call our colleagues at SBB Contact Center (0848 44 66 88, CHF 0.08/min), they are available 24/7.
I wish you a good weekend.
Regards
EleonoraS