By Flight
Paro International Airport is the only point of entry and exit for all travelers by flight to Bhutan. Only two airlines operate in and out of Paro International Airport, Druk Air, the national airline and Bhutan Airlines. The airlines operate an inbound flight from New Delhi, Kolkata, Bodh Gaya, Bagdogra and Guwahati in India and from Dhaka in Bangladesh and from Kathmandu in Nepal and from Bangkok Thailand and Singapore.
The Drukair operated from Banglore and Mumbai during the peak season depending on demand from the travel agents.
Entering Bhutan by road
There are three points of entry by road. The most preferred point of entry is from Phuntsholing (Chukha Dzongkhag), a border town in south western Bhutan that links with the Indian plains of West Bengal. This point of entry is 176 kilometers away from the capital city Thimphu, which is about 5 hour drive. The town is located approximately 170 kilometers east of the Indian National Airport Bagdogra.
Tourist can also enter through Gelephu in south central and Samdrup Jongkhar in south eastern Bhutan that link with the Indian state of Assam. Samdrup Jongkhar is approximately 150 kilometers away from Guwahati International Airport. This route is preferable if travelers plan to explore eastern Bhutan.