Kolkata Netaji S. Chandra, Paro, and New Delhi Indira Gandhi Intl are the top airports Drukair flies into and out of during the year.
Drukair does not have flights from Denpasar Bali Ngurah Rai at the moment. There are scheduled flights with Drukair out of Singapore Changi though (if you don’t mind flying from this airport). Flying with Ethiopian Air is recommended if you still want to fly from Denpasar Bali Ngurah Rai.