Travelers have 2 points of entry to Bhutan:
Arrive by Flight:
The main entry point for international travelers is Paro International Airport (PBH).
Currently, 5 countries offer flights to Bhutan, including India (New Delhi, Kolkata, Guwahati, Gaya), Nepal (Kathmandu), Thailand (Suvarnabhumi Airport), Singapore (Changi), and Bangladesh (Dhaka).
You can book your flight via the 2 Bhutanese Airlines: DrukAir & Bhutan Airlines.
Arrive by Road:
There are four official entry points by road from India:
Samtse (lower west)
Phuentsholing (lower west)
Gelephu (center)
Samdrup Jongkhar (east)