The route from Ahore to Gangtok covers approximately 2000 km. You can take a train to New Jalpaiguri and then a taxi to Gangtok. Driving via NH 27 is another option. Expect a travel time of 40 hours by train.
Total Distance: 2000 km by road, 1600 km air distance.
Book your train well in advance.
March to June and October to December.