You can reach Dehradun easily by flight, train or by bus. Dehradun Railway Station is directly connected with most of the cities like Delhi, Howrah, Mumbai, indore,Chennai etc. Direct Flights are available from Delhi to Dehradun and back. Normal and Volvo bus services are available from different cities to Dehradun.
The details of important Trains and Flights are given below . You can download it for your convenience.