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KOS to BIR: distance & flight time
Sihanoukville (Sihanoukville International Airport) → Biratnagar (Biratnagar Airport)
1,532 mi
2,465 km · 1,331 nm
3h 28m
estimated nonstop flight time
-1.2h
time difference · heading northwest
See live KOS→BIR fares Phone-only fares on this route — call free
Flight time details
1,532 miles nonstop takes roughly 3h 28m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1.2-hour time set-back when reading arrival times on your ticket.
The two airports
- KOS — Sihanoukville International Airport · Sihanoukville, Cambodia
- BIR — Biratnagar Airport · Biratnagar, Nepal
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 KOS
- PQC · Phu Quoc International Airport37 mi away
- PNH · Phnom Penh International Airport106 mi away
- VKG · Rach Gia Airport110 mi away
- KZC · Kampong Chhnang Airport132 mi away
Near BIR
- RJB · Rajbiraj Airport33 mi away
- BHP · Bhojpur Airport48 mi away
- BDP · Bhadrapur Airport51 mi away
- TMI · Tumling Tar Airport58 mi away
Frequently asked questions
How far is KOS from BIR?
The flight distance from Sihanoukville (KOS) to Biratnagar (BIR) is 1,532 miles (2,465 km, 1,331 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from KOS to BIR?
A nonstop flight takes about 3h 28m 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 Sihanoukville and Biratnagar?
Biratnagar is 1.2 hours behind Sihanoukville.
What is the cheapest way to fly from KOS to BIR?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on KOS–BIR that never appear on search engines, with no booking fees.