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FSI to SSN: distance & flight time
Fort Sill (Henry Post Army Air Field (Fort Sill)) → Seoul East (Seoul Air Base (K-16))
6,663 mi
10,722 km · 5,790 nm
13h 32m
estimated nonstop flight time
+14h
time difference · heading northwest
See live FSI→SSN fares Phone-only fares on this route — call free
Flight time details
6,663 miles nonstop takes roughly 13h 32m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 14-hour time gain when reading arrival times on your ticket.
The two airports
- FSI — Henry Post Army Air Field (Fort Sill) · Fort Sill, United States
- SSN — Seoul Air Base (K-16) · Seoul East, 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 FSI
- LAW · Lawton Fort Sill Regional Airport6 mi away
- DUC · Halliburton Field28 mi away
- HBR · Hobart Regional Airport44 mi away
- SPS · Sheppard Air Force Base-Wichita Falls Municipal Airport46 mi away
Near SSN
- ICN · Incheon International Airport36 mi away
- SWU · Suwon Airport15 mi away
- GMP · Gimpo International Airport19 mi away
- OSN · Osan Air Base25 mi away
Frequently asked questions
How far is FSI from SSN?
The flight distance from Fort Sill (FSI) to Seoul East (SSN) is 6,663 miles (10,722 km, 5,790 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from FSI to SSN?
A nonstop flight takes about 13h 32m 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 Fort Sill and Seoul East?
Seoul East is 14 hours ahead of Fort Sill.
What is the cheapest way to fly from FSI to SSN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on FSI–SSN that never appear on search engines, with no booking fees.