Druk Air is the only airlines to execute International flights in and out of Bhutan. Its unique airport is located in western part of Bhutan – Paro, which is also the important city as Bhutan’s second cultural, political, economic, educational and historical center. No matter flights from Calcutta or from Dacca, Druk Air’s air-routes are the most difficult ones in the world. However, flight between Kathmandu and Paro may be the world’s most fascinating air-route, for the aircraft may fly over the Himalayas, and you will find out that the Mt. Everest, Makalu and Cho Oyu, etc., are just close at hand. After an exaggerated landing action, the flight will land on the runway of only 1800-meter long in Paro.