The first stage is getting to a country from which you can fly on Druk Air or Tashi Air into the country (these are the only two available airlines). Any of the locations on the diagram at left can be used as a connection point. Nepal is of particular interest for a layover, because of it tremendous Buddhist presence and very long history on the trade route from India to Tibet, and the wonderful monasteries and sacred sites to be seen. Thailand is also a good choice for a stopover with its remarkable Wats and pilgrimage places. You can self-book accordingly, leaving enough time for your connection to Druk or Tashi.
To take the last leg from India, Nepal, Thailand or Singapore to PARO Airport, you need to book a flight on Druk Air or Tashi Air. But wait! Even though you can book online, your flight must match your VISA exactly! In fact, you likely cannot board the plane without the correct visa-flight matching dates. So it is best if this all happens through your guide company, Inner Journeys of Bhutan.
Americans (North or South) and European visitors need a visa in advance. This has to be arranged through the travel agency (such as Inner Journeys) and is usually no more than two weeks—and getting an extension is indeed difficult.
(Note that Indian Nationals can travel freely to Bhutan, obtaining a visa stamp at the airport or at the overland border)
Road travel in Bhutan varies from well paved highway to winding mountain trails at dizzying heights and very slow speeds.With IJ of B you will have a dedicated, full time driver, and according to the size of the group, anything from a private car, to an SUV, van or minibus. Luggage travels with you, either on board or in a separate vehicle, so you can just relax and let the landscape unfold all around you.