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ROI to FSI: distance & flight time
Roi Et (Roi Et Airport) → Fort Sill (Henry Post Army Air Field (Fort Sill))
8,639 mi
13,903 km · 7,507 nm
17h 24m
estimated nonstop flight time
-12h
time difference · heading north
See live ROI→FSI fares Phone-only fares on this route — call free
Flight time details
8,639 miles nonstop takes roughly 17h 24m gate to gate, flying north. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 12-hour time set-back when reading arrival times on your ticket.
The two airports
- ROI — Roi Et Airport · Roi Et, Thailand
- FSI — Henry Post Army Air Field (Fort Sill) · Fort Sill, 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 ROI
- KKC · Khon Kaen Airport70 mi away
- BFV · Buri Ram Airport70 mi away
- ZVK · Savannakhet Airport72 mi away
- SNO · Sakon Nakhon Airport78 mi away
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
Frequently asked questions
How far is ROI from FSI?
The flight distance from Roi Et (ROI) to Fort Sill (FSI) is 8,639 miles (13,903 km, 7,507 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ROI to FSI?
A nonstop flight takes about 17h 24m 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 Roi Et and Fort Sill?
Fort Sill is 12 hours behind Roi Et.
What is the cheapest way to fly from ROI to FSI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ROI–FSI that never appear on search engines, with no booking fees.