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GAI to OSN: distance & flight time
Gaithersburg (Montgomery County Airpark) → Osan (Osan Air Base)
6,948 mi
11,181 km · 6,037 nm
14h 5m
estimated nonstop flight time
+13h
time difference · heading north
See live GAI→OSN fares Phone-only fares on this route — call free
Flight time details
6,948 miles nonstop takes roughly 14h 5m gate to gate, flying north. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 13-hour time gain when reading arrival times on your ticket.
The two airports
- GAI — Montgomery County Airpark · Gaithersburg, 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 GAI
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 GAI from OSN?
The flight distance from Gaithersburg (GAI) to Osan (OSN) is 6,948 miles (11,181 km, 6,037 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from GAI to OSN?
A nonstop flight takes about 14h 5m 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 Gaithersburg and Osan?
Osan is 13 hours ahead of Gaithersburg.
What is the cheapest way to fly from GAI to OSN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on GAI–OSN that never appear on search engines, with no booking fees.