Reach Sikkim
Ex- Calcutta there are two options. Either by flight to Bagdogra or by train to New Jalpaiguri. From there the capital, Gangtok, is 4 hrs away.

Sikkim is well connected by rail and air to the rest of the country through Siliguri in West Bengal. There are no airports or railway stations in Sikkim. The primary means of transport within Sikkim is by road. To get to Sikkim you must first reach Siliguri.

a) By Air : The nearest airport is Bagdogra near Siliguri in West Bengal. It is connected by daily flights from New Delhi and 6 flights from Calcutta (excluding Thursdays) every week. It is 115 kms from Gangtok and takes about 4 1/2 hrs. Recently a 4-seater helicopter service from Bagdogra to Gangtok has started and takes about 20min.

b) By Rail : The broad guage railway station is New Jalpaiguri, near Siliguri. The Dadar Guwahati Express is the only direct train from Mumbai. From Calcutta, it is easily accessible by both rail and road. From Delhi, the New Delhi-Guwahati Rajdhani passes through New Jalpaiguri. (Please check railway schedules as they are apt to change)

c) From nearby hill stations: If you are planning a visit to Darjeeling, Kalimpong, Mirik or Bhutan, you can combine the trip with extensions to Sikkim or vice versa.