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GMP to GRF: distance & flight time
Seoul (Gimpo International Airport) → Fort Lewis (Gray Army Air Field)
5,193 mi
8,357 km · 4,512 nm
10h 39m
estimated nonstop flight time
-16h
time difference · heading northeast
See live GMP→GRF fares Phone-only fares on this route — call free
Flight time details
5,193 miles nonstop takes roughly 10h 39m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 16-hour time set-back when reading arrival times on your ticket.
The two airports
- GMP — Gimpo International Airport · Seoul, South Korea
- GRF — Gray Army Air Field · Fort Lewis, 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 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
Near GRF
- SEA · Seattle Tacoma International Airport29 mi away
- TCM · McChord Air Force Base6 mi away
- TIW · Tacoma Narrows Airport13 mi away
- OLM · Olympia Regional Airport17 mi away
Frequently asked questions
How far is GMP from GRF?
The flight distance from Seoul (GMP) to Fort Lewis (GRF) is 5,193 miles (8,357 km, 4,512 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from GMP to GRF?
A nonstop flight takes about 10h 39m 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 Seoul and Fort Lewis?
Fort Lewis is 16 hours behind Seoul.
What is the cheapest way to fly from GMP to GRF?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on GMP–GRF that never appear on search engines, with no booking fees.