All visitors to Bhutan require a visa to enter the country. Visa clearance must be obtained before coming to Bhutan and travel must be booked through a Bhutanese tour operator or international partner. Indian, Bangladeshis and Maldivian nationals can receive a visa on entry and it is not necessary for them to book travel through a tour operator, however it is recommended. In the case of Indian nationals a passport or voters card are acceptable on entry.
There are flights to destinations that include Bangkok, Delhi, Kolkata, Bagdogra, Bodh Gaya, Dhaka, Kathmandu, Guwahati, Singapore and Mumbai. At present two carriers operate to Bhutan, Drukair and Bhutan Airlines. And there are domestic airports in Yonphula in eastern Bhutan, Bumthang in central Bhutan, and Gelephu in south-central Bhutan. A second international airport is currently under construction in Gelephu along the southern border to India.
Phuentsholing, Gelephu and SamdrupJongkhar are the only land border areas open to tourists. The town of Phuentsholing in south-west is located approximately 170 km east of the Indian national airport at Bagdogra. After crossing Phuentsholing, you begin your journey to Thimphu, the capital city with travel time of about six hours for the 170 km stretch.
Gelephu in south-central Bhutan is another entry point to Bhutan. It is approximately 250 kms from Thimphu and the journey will take you through the sub-tropical areas of Bhutan before entering the alpine zone and then finally into Thimphu. One will have to traverse across three districts and the travel time will be about ten hours.
The district of SamdrupJongkhar in south-east Bhutan borders the Indian district of Darranga, Assam and is approximately 150 kms away from Guwahati, the capital city of Assam. The journey from Guwahati is about three hours. Tourists entering Bhutan through SamdrupJongkhar will take you to Trashigang, and from there over the lateral route to Monggar, Bumthang, Trongsa, WangduePhodrang and then finally into capital, Thimphu. The distance is about 700 kms and will take you a minimum of three days to reach Thimphu.