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CPR to OSN: distance & flight time
Casper (Casper-Natrona County International Airport) → Osan (Osan Air Base)
5,969 mi
9,606 km · 5,187 nm
12h 10m
estimated nonstop flight time
+15h
time difference · heading northwest
See live CPR→OSN fares Phone-only fares on this route — call free
Flight time details
5,969 miles nonstop takes roughly 12h 10m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 15-hour time gain when reading arrival times on your ticket.
The two airports
- CPR — Casper-Natrona County International Airport · Casper, 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 CPR
- RWL · Rawlins Municipal Airport/Harvey Field85 mi away
- RIW · Riverton Regional Airport101 mi away
- SAA · Shively Field103 mi away
- WRL · Worland Municipal Airport104 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 CPR from OSN?
The flight distance from Casper (CPR) to Osan (OSN) is 5,969 miles (9,606 km, 5,187 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from CPR to OSN?
A nonstop flight takes about 12h 10m 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 Casper and Osan?
Osan is 15 hours ahead of Casper.
What is the cheapest way to fly from CPR to OSN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on CPR–OSN that never appear on search engines, with no booking fees.