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 Samdrup Jongkhar 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 Samdrup Jongkhar will take you to Trashigang, and from there over the lateral route to Monggar, Bumthang, Trongsa, Wangdue Phodrang and then finally into capital, Thimphu. The distance is about 700 kms and will take you a minimum of three days to reach Thimphu.