Need help booking?
Unpublished phone-only deals available
DUC to OSN: distance & flight time
Duncan (Halliburton Field) → Osan (Osan Air Base)
6,710 mi
10,798 km · 5,830 nm
13h 37m
estimated nonstop flight time
+14h
time difference · heading northwest
See live DUC→OSN fares Phone-only fares on this route — call free
Flight time details
6,710 miles nonstop takes roughly 13h 37m 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
- DUC — Halliburton Field · Duncan, 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 DUC
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 DUC from OSN?
The flight distance from Duncan (DUC) to Osan (OSN) is 6,710 miles (10,798 km, 5,830 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from DUC to OSN?
A nonstop flight takes about 13h 37m 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 Duncan and Osan?
Osan is 14 hours ahead of Duncan.
What is the cheapest way to fly from DUC to OSN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on DUC–OSN that never appear on search engines, with no booking fees.