Dec 18, 2016 - 5:21 PM
Hi Cher, welcome to MySwissAlps!
I think it should be possible to purchase at the airport train station, but I am not 100% sure about that. If it's possible, a service fee of CHF 10 to 40 may apply ("Auftragspauschale") as they also charge this when buying international tickets. Also it could take quite some time as there are often queues there, and this is a product they do not sell every day I guess. It's mostly purchased online, through any of the websites listed here. You could contact the SBB to be sure about the options of a local purchase of an Interrail Switzerland Pass.
As you live in the Netherlands, you could buy it through www.treinreiswinkel.nl /zwitserland/one-country-pass-zwitserland. They offer free next business day shipping, so you can order fairly late when your travel plans are hopefully finalized. I wouldn't order later than Tuesday though, because of the holiday season.
I hope this helps at least a bit. Enjoy your stay!
