GRENOBLE-ISERE AEROPORT : mostly low-cost companies arrive at this airport ( EasyJet, Ryan Air and Blu-express). A 35min bus shuttle runs from Grenoble-Isere airport to Grenoble dowtown bus/train station.
GENEVA AIRPORT. A 3-hour bus shuttle runs (twice a day only) from Geneva downtown bus station to Grenoble dowtown bus/train station. Alternatively, a 2.5h train service runs between Geneva central station and Grenoble station.