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KEP to OSN: distance & flight time
Nepalgunj (Nepalgunj Airport) → Osan (Osan Air Base)
2,686 mi
4,323 km · 2,334 nm
5h 44m
estimated nonstop flight time
+3.3h
time difference · heading northeast
See live KEP→OSN fares Phone-only fares on this route — call free
Flight time details
2,686 miles nonstop takes roughly 5h 44m 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
- KEP — Nepalgunj Airport · Nepalgunj, 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 KEP
- SKH · Surkhet Airport33 mi away
- DNP · Tulsipur Airport38 mi away
- RUK · Rukum Chaurjahari Airport48 mi away
- DHI · Dhangarhi Airport80 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 KEP from OSN?
The flight distance from Nepalgunj (KEP) to Osan (OSN) is 2,686 miles (4,323 km, 2,334 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from KEP to OSN?
A nonstop flight takes about 5h 44m 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 Nepalgunj and Osan?
Osan is 3.3 hours ahead of Nepalgunj.
What is the cheapest way to fly from KEP to OSN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on KEP–OSN that never appear on search engines, with no booking fees.