The best way to enter Bhutan is by Druk Air, the national flag carrier. Following stations are connected with Druk Air flight:
Druk Air is the only airline operating to/from Bhutan.
Entry and exit to and from Bhutan by land is also possible through Phuntsholing, the southern Bhutanese border town with India. Bagdogra in West Bengal is the nearest airport approximately 4 hours drive. For travelers wishing to visit Indian state of Sikkim, West Bengal (Darjeeling, Kalimpong) along with Bhutan, Phuntsholing serves as the convenient point.
Exit from Bhutan can be made through Samdrup Jongkhar also. This frontier Bhutanese town is approximately 3 hours drive from Guwahati, the capital town of Indian northeastern state of Assam. Samdrup Jongkhar is the authorize exit point only and an important link for visiting further Indian northeastern states.
As per our government's rule, it is mandatory to travel at least one way by Druk Air. It can be either entry or exit or both.