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OSN to ALS: distance & flight time
Osan (Osan Air Base) → Alamosa (San Luis Valley Regional Bergman Field)
6,280 mi
10,106 km · 5,457 nm
12h 47m
estimated nonstop flight time
-15h
time difference · heading northeast
See live OSN→ALS fares Phone-only fares on this route — call free
Flight time details
6,280 miles nonstop takes roughly 12h 47m 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
- ALS — San Luis Valley Regional Bergman Field · Alamosa, 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 ALS
- TSM · Taos Regional Airport68 mi away
- RTN · Raton Municipal-Crews Field89 mi away
- PUB · Pueblo Memorial Airport95 mi away
- GUC · Gunnison Crested Butte Regional Airport96 mi away
Frequently asked questions
How far is OSN from ALS?
The flight distance from Osan (OSN) to Alamosa (ALS) is 6,280 miles (10,106 km, 5,457 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from OSN to ALS?
A nonstop flight takes about 12h 47m 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 Alamosa?
Alamosa is 15 hours behind Osan.
What is the cheapest way to fly from OSN to ALS?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on OSN–ALS that never appear on search engines, with no booking fees.