The best way to travel to Bhutan is taking a plane to Paro, where Bhutan's only international airport is located in, from Thailand, India, Nepal, Bangladesh or Singapore. Druk Air, the Royal Bhutan Airlines, is the only carrier for the international flights to Bhutan
The Indian cities, where there are flights to Bhutan, are Delhi, Mumbai, Kolkata, Bagdogra, Gaya and Guwahati. Other Cities, where there are flights to Bhutan, are Bangkok (Thailand), Kathmandu (Nepal), Dhaka (Bangladesh) and Changi (Singapore).
Tourists can also travel to Bhutan from India by road, but the condition of the roads is not good, so this way is not recommended.