Geneva Airport (GVA)

Geneva has a great choice of flights to and from the UK, the US, almost anywhere - it's a hub and the flights run all year long.  It is, however, a fairly long transfer from here to the resorts of the Oisans - 2 hours 45 minutes without traffic.   It is right in the centre of town.

Tips from a local (who has spent too much time hanging around there): Switzerland IS expensive.  Take a packed lunch if at all possible.  It is home to the bad €10 sandwich.  The wi-fi is however, quite good and you get 90 minutes free - there are loads of networks to choose from but the one to go for is called: "Free WiFi GVA".  They have an app too - it's called "GVApp" and it's good for flight information.