May 8, 2017 - 7:19 AM
You don't have to book a long way in advance, the day before should be OK. The various tour operators have ticket booths close to the landing field, which is across the road from the casino. Just walk around and see what is on offer. If you are there early in the morning, you might be able to get a flight on the same day, it all depends on how busy they are.
Keep in mind the weather conditions. Obviously, if the weather is bad you will have to wait. Less obviously, pilots may not fly if a Föhn is blowing. This is a strong, warm southerly wind that brings clear skys and bright, sunny days. It can also be very dangerous to fly in because it can create very strong downdrafts. The local pilots will be able to tell you if conditions are right or not.
My wife and I flew with SkyWings from Beattenberg. They were very professional and we will fly with them again next time we go. Having said that, I would expect any operator in Interlaken to be very experienced and safe to fly with.
Let me know if you have any questions