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FSI to IST: distance & flight time
Fort Sill (Henry Post Army Air Field (Fort Sill)) → Istanbul (Istanbul Airport)
6,212 mi
9,997 km · 5,398 nm
12h 39m
estimated nonstop flight time
+8h
time difference · heading northeast
See live FSI→IST fares Phone-only fares on this route — call free
Flight time details
6,212 miles nonstop takes roughly 12h 39m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 8-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
- IST — Istanbul Airport · Istanbul, Turkey
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 IST
- ISL · Atatürk International Airport21 mi away
- SAW · Sabiha Gökçen International Airport39 mi away
- TEQ · Tekirdağ Çorlu Airport44 mi away
- BTZ · Bursa Airport73 mi away
Frequently asked questions
How far is FSI from IST?
The flight distance from Fort Sill (FSI) to Istanbul (IST) is 6,212 miles (9,997 km, 5,398 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from FSI to IST?
A nonstop flight takes about 12h 39m 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 Istanbul?
Istanbul is 8 hours ahead of Fort Sill.
What is the cheapest way to fly from FSI to IST?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on FSI–IST that never appear on search engines, with no booking fees.