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OSN to AST: distance & flight time
Osan (Osan Air Base) → Astoria (Astoria Regional Airport)
5,201 mi
8,370 km · 4,519 nm
10h 40m
estimated nonstop flight time
-16h
time difference · heading northeast
See live OSN→AST fares Phone-only fares on this route — call free
Flight time details
5,201 miles nonstop takes roughly 10h 40m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 16-hour time set-back when reading arrival times on your ticket.
The two airports
- OSN — Osan Air Base · Osan, South Korea
- AST — Astoria Regional Airport · Astoria, United States
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 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
Near AST
- KLS · Southwest Washington Regional Airport47 mi away
- OTK · Tillamook Airport51 mi away
- HQM · Bowerman Airport56 mi away
- CLS · Chehalis Centralia Airport56 mi away
Frequently asked questions
How far is OSN from AST?
The flight distance from Osan (OSN) to Astoria (AST) is 5,201 miles (8,370 km, 4,519 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from OSN to AST?
A nonstop flight takes about 10h 40m 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 Osan and Astoria?
Astoria is 16 hours behind Osan.
What is the cheapest way to fly from OSN to AST?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on OSN–AST that never appear on search engines, with no booking fees.