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UTH to FSI: distance & flight time
Udon Thani (Udon Thani Airport) → Fort Sill (Henry Post Army Air Field (Fort Sill))
8,581 mi
13,810 km · 7,457 nm
17h 18m
estimated nonstop flight time
-12h
time difference · heading north
See live UTH→FSI fares Phone-only fares on this route — call free
Flight time details
8,581 miles nonstop takes roughly 17h 18m 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
- UTH — Udon Thani Airport · Udon Thani, 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 UTH
- VTE · Wattay International Airport44 mi away
- KKC · Khon Kaen Airport64 mi away
- LOE · Loei Airport70 mi away
- SNO · Sakon Nakhon Airport89 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 UTH from FSI?
The flight distance from Udon Thani (UTH) to Fort Sill (FSI) is 8,581 miles (13,810 km, 7,457 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from UTH to FSI?
A nonstop flight takes about 17h 18m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
Are there nonstop flights from UTH to FSI?
Nonstop service on UTH–FSI depends on the season and the day of week. Run the fare search on this page with the nonstop filter applied to see current direct options; when there is no nonstop, a single connection through a carrier hub adds roughly 2–4 hours to the 17h 18m nonstop estimate.
What is the time difference between Udon Thani and Fort Sill?
Fort Sill is 12 hours behind Udon Thani.
What is the cheapest way to fly from UTH to FSI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on UTH–FSI that never appear on search engines, with no booking fees.
Why are some UTH to FSI fares phone-only?
Consolidator contracts let us sell certain UTH–FSI tickets below the price airlines permit us to publish online, so those fares can only be quoted over the phone. Call the travel desk and an agent will check phone-only inventory for your dates.