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DCA to OSN: distance & flight time
Washington (Ronald Reagan Washington National Airport) → Osan (Osan Air Base)
6,971 mi
11,218 km · 6,057 nm
14h 8m
estimated nonstop flight time
+13h
time difference · heading north
See live DCA→OSN fares Phone-only fares on this route — call free
Flight time details
6,971 miles nonstop takes roughly 14h 8m gate to gate, flying north. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 13-hour time gain when reading arrival times on your ticket.
The two airports
- DCA — Ronald Reagan Washington National Airport · Washington, 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 DCA
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 DCA from OSN?
The flight distance from Washington (DCA) to Osan (OSN) is 6,971 miles (11,218 km, 6,057 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from DCA to OSN?
A nonstop flight takes about 14h 8m 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 Washington and Osan?
Osan is 13 hours ahead of Washington.
What is the cheapest way to fly from DCA to OSN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on DCA–OSN that never appear on search engines, with no booking fees.