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FSI to YSL: distance & flight time
Fort Sill (Henry Post Army Air Field (Fort Sill)) → St Leonard (St Leonard Airport)
1,799 mi
2,895 km · 1,563 nm
4h
estimated nonstop flight time
—
time difference · heading northeast
See live FSI→YSL fares Phone-only fares on this route — call free
Flight time details
1,799 miles nonstop takes roughly 4h gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Both airports share the same local time, so schedules read exactly as flown.
The two airports
- FSI — Henry Post Army Air Field (Fort Sill) · Fort Sill, United States
- YSL — St Leonard Airport · St Leonard, Canada
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 YSL
- CAR · Caribou Municipal Airport22 mi away
- WFK · Northern Aroostook Regional Airport24 mi away
- PQI · Northern Maine Regional Airport at Presque Isle34 mi away
- HUL · Houlton International Airport71 mi away
Frequently asked questions
How far is FSI from YSL?
The flight distance from Fort Sill (FSI) to St Leonard (YSL) is 1,799 miles (2,895 km, 1,563 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from FSI to YSL?
A nonstop flight takes about 4h 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 cheapest way to fly from FSI to YSL?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on FSI–YSL that never appear on search engines, with no booking fees.