Where do I enter Bhutan?

There are a number of airports where you can fly into Bhutan from (Bangkok, Delhi, Kolkata, Bagdogra, Bodh Gaya, Dhaka, Kathmandu, Guwahati, Singapore and Mumbai.). At present two carriers operate to Bhutan, Drukair and Bhutan Airlines. You can also enter/exit via Land from the frontier town of Phuentsholing and Samdrup Jongkher. The nearest airport from Phuentsholing is at Bagdogra (175km) in West Bengal near Siliguri about 4 hours drive and from Samdrup Jongkher, it is Guwahati airport in Assam state, 110km, 3 hours drive.