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FSI to KOP: distance & flight time
Fort Sill (Henry Post Army Air Field (Fort Sill)) → Nakhon Phanom (Nakhon Phanom Airport)
8,536 mi
13,737 km · 7,418 nm
17h 12m
estimated nonstop flight time
+12h
time difference · heading northwest
See live FSI→KOP fares Phone-only fares on this route — call free
Flight time details
8,536 miles nonstop takes roughly 17h 12m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 12-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
- KOP — Nakhon Phanom Airport · Nakhon Phanom, Thailand
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 KOP
- SNO · Sakon Nakhon Airport37 mi away
- ZVK · Savannakhet Airport58 mi away
- ROI · Roi Et Airport105 mi away
- VII · Vinh Airport115 mi away
Frequently asked questions
How far is FSI from KOP?
The flight distance from Fort Sill (FSI) to Nakhon Phanom (KOP) is 8,536 miles (13,737 km, 7,418 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from FSI to KOP?
A nonstop flight takes about 17h 12m 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 Nakhon Phanom?
Nakhon Phanom is 12 hours ahead of Fort Sill.
What is the cheapest way to fly from FSI to KOP?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on FSI–KOP that never appear on search engines, with no booking fees.