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YST to FSI: distance & flight time
St. Theresa Point (St. Theresa Point Airport) → Fort Sill (Henry Post Army Air Field (Fort Sill))
1,337 mi
2,152 km · 1,162 nm
3h 22m
estimated nonstop flight time
Same time
time difference · heading south
See live YST→FSI fares Phone-only fares on this route — call free
Flight time details
1,337 miles nonstop takes roughly 3h 22m gate to gate, flying south. 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
- YST — St. Theresa Point Airport · St. Theresa Point, 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 YST
- YIV · Island Lake Airport8 mi away
- YGO · Gods Lake Narrows Airport51 mi away
- YRS · Red Sucker Lake Airport57 mi away
- ZGI · Gods River Airport75 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 YST from FSI?
The flight distance from St. Theresa Point (YST) to Fort Sill (FSI) is 1,337 miles (2,152 km, 1,162 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from YST to FSI?
A nonstop flight takes about 3h 22m 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 YST to FSI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on YST–FSI that never appear on search engines, with no booking fees.