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BIR to USM: distance & flight time
Biratnagar (Biratnagar Airport) → Ko Samui (Samui Airport)
1,438 mi
2,315 km · 1,250 nm
3h 36m
estimated nonstop flight time
+1.3h
time difference · heading southeast
See live BIR→USM fares Phone-only fares on this route — call free
Flight time details
1,438 miles nonstop takes roughly 3h 36m gate to gate, flying southeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1.3-hour time gain when reading arrival times on your ticket.
The two airports
- BIR — Biratnagar Airport · Biratnagar, Nepal
- USM — Samui Airport · Ko Samui, Thailand
Distances are great-circle ("as the crow flies") — the same basis airlines use for frequent-flyer miles.
Alternate airports can cut this fare
Flying from or into a nearby airport is the #1 trick our agents use to beat online prices. Call and we'll compare every combination on one call.
Near BIR
- RJB · Rajbiraj Airport33 mi away
- BHP · Bhojpur Airport48 mi away
- BDP · Bhadrapur Airport51 mi away
- TMI · Tumling Tar Airport58 mi away
Near USM
- URT · Surat Thani Airport69 mi away
- NST · Nakhon Si Thammarat Airport70 mi away
- CJM · Chumphon Airport93 mi away
- UNN · Ranong Airport102 mi away
Frequently asked questions
How far is BIR from USM?
The flight distance from Biratnagar (BIR) to Ko Samui (USM) is 1,438 miles (2,315 km, 1,250 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from BIR to USM?
A nonstop flight takes about 3h 36m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
What is the time difference between Biratnagar and Ko Samui?
Ko Samui is 1.3 hours ahead of Biratnagar.
What is the cheapest way to fly from BIR to USM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on BIR–USM that never appear on search engines, with no booking fees.