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SEP to OSN: distance & flight time
Stephenville (Stephenville Clark Regional Airport) → Osan (Osan Air Base)
6,830 mi
10,992 km · 5,935 nm
13h 52m
estimated nonstop flight time
+14h
time difference · heading northwest
See live SEP→OSN fares Phone-only fares on this route — call free
Flight time details
6,830 miles nonstop takes roughly 13h 52m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 14-hour time gain when reading arrival times on your ticket.
The two airports
- SEP — Stephenville Clark Regional Airport · Stephenville, United States
- 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 SEP
- MWL · Mineral Wells Airport40 mi away
- DFW · Dallas Fort Worth International Airport81 mi away
- BKD · Stephens County Airport54 mi away
- FWH · NAS Fort Worth JRB/Carswell Field57 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 SEP from OSN?
The flight distance from Stephenville (SEP) to Osan (OSN) is 6,830 miles (10,992 km, 5,935 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SEP to OSN?
A nonstop flight takes about 13h 52m 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 Stephenville and Osan?
Osan is 14 hours ahead of Stephenville.
What is the cheapest way to fly from SEP to OSN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SEP–OSN that never appear on search engines, with no booking fees.