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YIF to FSI: distance & flight time
St-Augustin (St Augustin Airport) → Fort Sill (Henry Post Army Air Field (Fort Sill))
2,275 mi
3,661 km · 1,977 nm
4h 56m
estimated nonstop flight time
-1h
time difference · heading west
See live YIF→FSI fares Phone-only fares on this route — call free
Flight time details
2,275 miles nonstop takes roughly 4h 56m gate to gate, flying west. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1-hour time set-back when reading arrival times on your ticket.
The two airports
- YIF — St Augustin Airport · St-Augustin, Canada
- 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 YIF
- ZLT · La Tabatière Airport30 mi away
- ZTB · Tête-à-la-Baleine Airport49 mi away
- YBX · Lourdes de Blanc Sablon Airport66 mi away
- YHR · Chevery Airport67 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 YIF from FSI?
The flight distance from St-Augustin (YIF) to Fort Sill (FSI) is 2,275 miles (3,661 km, 1,977 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from YIF to FSI?
A nonstop flight takes about 4h 56m 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 St-Augustin and Fort Sill?
Fort Sill is 1 hour behind St-Augustin.
What is the cheapest way to fly from YIF to FSI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on YIF–FSI that never appear on search engines, with no booking fees.