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FSI to REP: distance & flight time
Fort Sill (Henry Post Army Air Field (Fort Sill)) → Siem-reap (Siem Reap International Airport)
8,810 mi
14,179 km · 7,656 nm
17h 45m
estimated nonstop flight time
+12h
time difference · heading northwest
See live FSI→REP fares Phone-only fares on this route — call free
Flight time details
8,810 miles nonstop takes roughly 17h 45m 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
- REP — Siem Reap International Airport · Siem-reap, Cambodia
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 REP
- BBM · Battambang Airport45 mi away
- KZC · Kampong Chhnang Airport95 mi away
- PXR · Surin Airport103 mi away
- TDX · Trat Airport128 mi away
Frequently asked questions
How far is FSI from REP?
The flight distance from Fort Sill (FSI) to Siem-reap (REP) is 8,810 miles (14,179 km, 7,656 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from FSI to REP?
A nonstop flight takes about 17h 45m 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 Siem-reap?
Siem-reap is 12 hours ahead of Fort Sill.
What is the cheapest way to fly from FSI to REP?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on FSI–REP that never appear on search engines, with no booking fees.