Now travellers from Guwahati going to Bhutan can fly into Paro airport, instead of travelling overland for 24 hrs or so. Introductory fare is Rs. 3000 one way, a very good deal considering the time and money saved on the road travel. Flights are currently once a fortnight.
Flight is not listed on the Drukair website yet, so you’ll have to contact their authorised travel agent to do the ticket.