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OSN to GAI: distance & flight time
Osan (Osan Air Base) → Gaithersburg (Montgomery County Airpark)
6,948 mi
11,181 km · 6,037 nm
14h 5m
estimated nonstop flight time
-13h
time difference · heading north
See live OSN→GAI 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 set-back when reading arrival times on your ticket.
The two airports
- OSN — Osan Air Base · Osan, South Korea
- GAI — Montgomery County Airpark · Gaithersburg, 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 GAI
Frequently asked questions
How far is OSN from GAI?
The flight distance from Osan (OSN) to Gaithersburg (GAI) 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 OSN to GAI?
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 Osan and Gaithersburg?
Gaithersburg is 13 hours behind Osan.
What is the cheapest way to fly from OSN to GAI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on OSN–GAI that never appear on search engines, with no booking fees.