By Air :
The best way to enter Bhutan is by Druk Air, the National Airlines. The Following stations are connected with Druk Air flight
PBH: Paro Bhutan
BKK: Bangkok. (Thailand) DEL: Delhi. (India)
CCU: Calcutta. (India)
KTM: Kathmandu. (Nepal)
DAC: Dhaka. (Bangladesh)
Entry / Exit to/from Bhutan is also possible through Phuentsholing, the southern Bhutanese border town. Bagdogra, in the state of west Bengal India is the nearest airport approximately 4 hrs. drive from Phuentsholing. For travelers wishing to visit Indian states of Sikkim, Darjeeling, West Bengal along with Bhutan, you have to exist from Phuentsholing. Exit to north east part of India from Samdrup Jongkhar to the State of Assam, the land of beautiful tea garden in India will also be possible.