This website extols the virtues of travelling to ski resorts by train. Looks like it takes a whole lot of time, is no cheaper than flying and there needs to be more than 2 of you to cut your carbon footprint.
http://www.snowcarbon.co.uk/ski-resorts/megeve/megeve-journey
The night train from Paris, on Friday and Saturdays, appears to be the best option.
This isn’t the original link; which was an article about how more (or not) carbon efficient it was travelling by Train. Now its showing you times & routes
The big sell is here…
http://www.snowcarbon.co.uk/why-go-by-train
Carbon comparisons….
http://www.snowcarbon.co.uk/why-go-by-train/more-sustainable-0
I’d expect the car figures to have dropped with recent models