Dehradun to Gangtok

Gangtok is approximately 1250+ kms from Dehradun. The fastest way to reach Gangtok from Dehradun is by Flight, Cab Via Siliguri. It takes approximately 7 hours. The cheapest way to reach Gangtok from Dehradun is by Flight, Train, Cab Via Lucknow, Siliguri which would take approximately 23 hours.