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YST to GTF: distance & flight time
St. Theresa Point (St. Theresa Point Airport) → Great Falls (Great Falls International Airport)
844 mi
1,358 km · 733 nm
2h 18m
estimated nonstop flight time
-1h
time difference · heading southwest
See live YST→GTF fares Phone-only fares on this route — call free
Flight time details
844 miles nonstop takes roughly 2h 18m gate to gate, flying southwest. 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
- YST — St. Theresa Point Airport · St. Theresa Point, Canada
- GTF — Great Falls International Airport · Great 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 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 GTF
- HLN · Helena Regional Airport67 mi away
- CTB · Cut Bank International Airport91 mi away
- LWT · Lewistown Municipal Airport94 mi away
- HVR · Havre City County Airport104 mi away
Frequently asked questions
How far is YST from GTF?
The flight distance from St. Theresa Point (YST) to Great Falls (GTF) is 844 miles (1,358 km, 733 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from YST to GTF?
A nonstop flight takes about 2h 18m 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. Theresa Point and Great Falls?
Great Falls is 1 hour behind St. Theresa Point.
What is the cheapest way to fly from YST to GTF?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on YST–GTF that never appear on search engines, with no booking fees.