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FSI to ISM: distance & flight time
Fort Sill (Henry Post Army Air Field (Fort Sill)) → Kissimmee (Kissimmee Gateway Airport)
1,090 mi
1,754 km · 947 nm
2h 50m
estimated nonstop flight time
+1h
time difference · heading east
See live FSI→ISM fares Phone-only fares on this route — call free
Flight time details
1,090 miles nonstop takes roughly 2h 50m gate to gate, flying east. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1-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
- ISM — Kissimmee Gateway Airport · Kissimmee, 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 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 ISM
- MCO · Orlando International Airport12 mi away
- ORL · Orlando Executive Airport19 mi away
- GIF · Winter Haven Regional Airport - Gilbert Field25 mi away
- TPA · Tampa International Airport70 mi away
Frequently asked questions
How far is FSI from ISM?
The flight distance from Fort Sill (FSI) to Kissimmee (ISM) is 1,090 miles (1,754 km, 947 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from FSI to ISM?
A nonstop flight takes about 2h 50m 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 Kissimmee?
Kissimmee is 1 hour ahead of Fort Sill.
What is the cheapest way to fly from FSI to ISM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on FSI–ISM that never appear on search engines, with no booking fees.