I will be landing at Geneva airport (Switzerland) in the coming mid June. As I would like to go to Metabief, France, I am thinking to take train from Train station Geneva Cornavin (near Geneva airport) to Vallorbe followed by a bus to Metabief.
This website sells train tickets. However, I am not sure whether my flight would be delayed and so I am not planning to purchase online.
As this is my first time travelling to Geneva airport, I am not sure whether I can purchase train ticket on the spot.
One-way tickets in Switzerland are valid for the whole day (unless you buy a specific Supersaver Ticket), so you can easily buy it online a few days before you arrive and take the printout with you. What you need to know though is whether you are going to take the connection where you change trains in Lausanne, or the one where you change trains in Renens. Tickets for one can not be used for the other.
And to answer your actual question: Yes, you can buy tickets on all train stations. On the smaller ones there will be only ticket machines though, but if you have a credit card you should be fine.
PS: Actually, depending on when you arrive, it's probably either
or the same connection starting at 11:32.
