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FSI to IAG: distance & flight time
Fort Sill (Henry Post Army Air Field (Fort Sill)) → Niagara Falls (Niagara Falls International Airport)
1,194 mi
1,922 km · 1,038 nm
3h 4m
estimated nonstop flight time
+1h
time difference · heading northeast
See live FSI→IAG fares Phone-only fares on this route — call free
Flight time details
1,194 miles nonstop takes roughly 3h 4m gate to gate, flying northeast. 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
- IAG — Niagara Falls International Airport · Niagara Falls, 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 IAG
- YYZ · Lester B. Pearson International Airport52 mi away
- YCM · Niagara District Airport13 mi away
- BUF · Buffalo Niagara International Airport16 mi away
- DU9 · Dunnville Airport37 mi away
Frequently asked questions
How far is FSI from IAG?
The flight distance from Fort Sill (FSI) to Niagara Falls (IAG) is 1,194 miles (1,922 km, 1,038 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from FSI to IAG?
A nonstop flight takes about 3h 4m 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 Niagara Falls?
Niagara Falls is 1 hour ahead of Fort Sill.
What is the cheapest way to fly from FSI to IAG?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on FSI–IAG that never appear on search engines, with no booking fees.