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OSN to ASE: distance & flight time
Osan (Osan Air Base) → Aspen (Aspen-Pitkin Co/Sardy Field)
6,150 mi
9,898 km · 5,344 nm
12h 32m
estimated nonstop flight time
-15h
time difference · heading northeast
See live OSN→ASE fares Phone-only fares on this route — call free
Flight time details
6,150 miles nonstop takes roughly 12h 32m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 15-hour time set-back when reading arrival times on your ticket.
The two airports
- OSN — Osan Air Base · Osan, South Korea
- ASE — Aspen-Pitkin Co/Sardy Field · Aspen, 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 ASE
- EGE · Eagle County Regional Airport29 mi away
- GUC · Gunnison Crested Butte Regional Airport48 mi away
- RIL · Garfield County Regional Airport50 mi away
- MTJ · Montrose Regional Airport74 mi away
Frequently asked questions
How far is OSN from ASE?
The flight distance from Osan (OSN) to Aspen (ASE) is 6,150 miles (9,898 km, 5,344 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from OSN to ASE?
A nonstop flight takes about 12h 32m 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 Aspen?
Aspen is 15 hours behind Osan.
What is the cheapest way to fly from OSN to ASE?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on OSN–ASE that never appear on search engines, with no booking fees.