Chalet Ribot is less that an hours drive by bus or car from Grenoble city centre.
The three nearest airports are :
Grenoble airport 1 hr 25 mins away
Lyon airport        1 hr 50 mins away
Geneva airport   2hrs 50 mins away

Useful Links

www.letour.fr  Tour de France offical site
www.photobreton.com  Photos of tourists climbing the Alpe
http://grenoblecycling.free.fr  Info and stats on all the big climbs near Chalet Ribot
www.autoreservation.com  Link to all the best car hire companies for local airports
www.alpedhuez.com  Alpe d Huez offical website for indepth info on the resort
www.tourisme-oisans.com  Local tourist office website