The cheapest flight to London you can get by boooking 18 days before departure.
The most popular airlines on the route Grenoble - London: easyJet (U2), Ryanair (FR), British Airways (BA).
The cheapest flights you can book on the route Grenoble-Isere (GNB) - Stansted (STN).
Direct flights last about 1h 35min.
Direct flights available 2 days a week - Saturday, Sunday.
Direct flights: Ryanair (FR), easyJet (U2), Monarch Airlines (ZB).