Need help booking?
Unpublished phone-only deals available
FSI to PRH: distance & flight time
Fort Sill (Henry Post Army Air Field (Fort Sill)) → Phrae (Phrae Airport)
8,591 mi
13,826 km · 7,466 nm
17h 19m
estimated nonstop flight time
+12h
time difference · heading north
See live FSI→PRH fares Phone-only fares on this route — call free
Flight time details
8,591 miles nonstop takes roughly 17h 19m gate to gate, flying north. 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
- PRH — Phrae Airport · Phrae, 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 PRH
- LPT · Lampang Airport44 mi away
- NNT · Nan Airport62 mi away
- THS · Sukhothai Airport66 mi away
- CNX · Chiang Mai International Airport90 mi away
Frequently asked questions
How far is FSI from PRH?
The flight distance from Fort Sill (FSI) to Phrae (PRH) is 8,591 miles (13,826 km, 7,466 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from FSI to PRH?
A nonstop flight takes about 17h 19m 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 Phrae?
Phrae is 12 hours ahead of Fort Sill.
What is the cheapest way to fly from FSI to PRH?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on FSI–PRH that never appear on search engines, with no booking fees.