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OSN to GMP: distance & flight time
Osan (Osan Air Base) → Seoul (Gimpo International Airport)
35 mi
56 km · 30 nm
34m
estimated nonstop flight time
Same time
time difference · heading north
See live OSN→GMP fares Phone-only fares on this route — call free
Flight time details
35 miles nonstop takes roughly 34m gate to gate, flying north. Add 45–90 minutes per connection if there's no nonstop service. Both airports share the same local time, so schedules read exactly as flown.
The two airports
- OSN — Osan Air Base · Osan, South Korea
- GMP — Gimpo International Airport · Seoul, 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 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 GMP
- ICN · Incheon International Airport20 mi away
- SSN · Seoul Air Base (K-16)19 mi away
- SWU · Suwon Airport25 mi away
- OSN · Osan Air Base35 mi away
Frequently asked questions
How far is OSN from GMP?
The flight distance from Osan (OSN) to Seoul (GMP) is 35 miles (56 km, 30 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from OSN to GMP?
A nonstop flight takes about 34m 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 cheapest way to fly from OSN to GMP?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on OSN–GMP that never appear on search engines, with no booking fees.