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CLS to OSN: distance & flight time
Chehalis (Chehalis Centralia Airport) → Osan (Osan Air Base)
5,211 mi
8,387 km · 4,528 nm
10h 41m
estimated nonstop flight time
+16h
time difference · heading northwest
See live CLS→OSN fares Phone-only fares on this route — call free
Flight time details
5,211 miles nonstop takes roughly 10h 41m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 16-hour time gain when reading arrival times on your ticket.
The two airports
- CLS — Chehalis Centralia Airport · Chehalis, 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 CLS
- OLM · Olympia Regional Airport21 mi away
- SEA · Seattle Tacoma International Airport62 mi away
- GRF · Gray Army Air Field34 mi away
- KLS · Southwest Washington Regional Airport39 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 CLS from OSN?
The flight distance from Chehalis (CLS) to Osan (OSN) is 5,211 miles (8,387 km, 4,528 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from CLS to OSN?
A nonstop flight takes about 10h 41m 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 Chehalis and Osan?
Osan is 16 hours ahead of Chehalis.
What is the cheapest way to fly from CLS to OSN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on CLS–OSN that never appear on search engines, with no booking fees.