After a week in Switzerland using public transportation, we intend to take the train to the Geneva airport and rent a car on the French side, then use that car for the 2nd week of our vacation in France, returning it at the Marseille airport. The one-way return fee isn't bad, only about $90.
It would be great to get tips from anyone who has ever arrived at the Geneva airport on the Swiss side by train and rented a car on the French side. My own research indicates we'll have a 30 minute walk and there are areas we can't pass through unless we're holding a boarding pass for a flight or a confirmed car rental reservation (which we'll have). Is there a shuttle bus or tram or does the need to present this paperwork at some check point mean we'll just be walking?
We thought about spending the rest of this day on the eastern shore of Lake Geneva before heading down to our accommodations in Chamonix. The car rental co. is Sixt and I read on their website that their cars rented on either side of the Geneva airport can be driven in both France and Switzerland, with no extra fees, but if you don't return it in the same country where you rented it, a high additional fee will be charged. They also caution that if you are driving the car on any "motorways" in Switzerland, you will need to buy a 40 CHF vignette. This vignette isn't required using the car on Switzerland's "ordinary roads."
Does anyone have experience with this? Can we drive over to Montreux or Vevey, then from that area down to Chamonix at the end of the day, without having to pay this vignette? If the answer is no, we'll just reconfigure our day to rent the car at the very end.