Hello Ddezelic
You can search the timetable and you will find the different prices.
Between Geneva and Zinal, you cannot buy discounted tickets. Saver Day Passes are too expensive on this day and you cannot use Supersaver Tickets because you don’t know if the flight will arrive on time. It is not necessary to buy regular point-to-point tickets in advance and no reservation is needed, you can also purchase them after your arrival in Switzerland.
Between Zinal and Geneva, you can buy Supersaver Tickets, but you must take the selected buses/trains, or you can buy Saver Day Passes and take every bus/train on this day. Note that discounted tickets must be purchased in advance to obtain the best prices and they are not refundable, except the FLEX tickets ( Refund 50%).
Kind regards
Danhiel