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BIR to OSN: distance & flight time
Biratnagar (Biratnagar Airport) → Osan (Osan Air Base)
2,428 mi
3,908 km · 2,110 nm
5h 14m
estimated nonstop flight time
+3.3h
time difference · heading northeast
See live BIR→OSN fares Phone-only fares on this route — call free
Flight time details
2,428 miles nonstop takes roughly 5h 14m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 3.3-hour time gain when reading arrival times on your ticket.
The two airports
- BIR — Biratnagar Airport · Biratnagar, Nepal
- OSN — Osan Air Base · Osan, South Korea
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 OSN
- ICN · Incheon International Airport41 mi away
- SWU · Suwon Airport10 mi away
- SSN · Seoul Air Base (K-16)25 mi away
- GMP · Gimpo International Airport35 mi away
Frequently asked questions
How far is BIR from OSN?
The flight distance from Biratnagar (BIR) to Osan (OSN) is 2,428 miles (3,908 km, 2,110 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from BIR to OSN?
A nonstop flight takes about 5h 14m 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 Osan?
Osan is 3.3 hours ahead of Biratnagar.
What is the cheapest way to fly from BIR to OSN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on BIR–OSN that never appear on search engines, with no booking fees.