To reach Dehradun from Dhanyakuria, travel to Kolkata first. From Howrah, you can board direct trains like the Doon Express to Dehradun Junction. Alternatively, take a flight from Kolkata to Jolly Grant Airport.
Total Distance: Driving distance 1600 km, Air distance 1400 km.
Book well in advance as this is a popular long-distance route.
October to March for pleasant weather.