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GTF to XSI: distance & flight time
Great Falls (Great Falls International Airport) → South Indian Lake (South Indian Lake Airport)
830 mi
1,336 km · 721 nm
2h 16m
estimated nonstop flight time
+1h
time difference · heading northeast
See live GTF→XSI fares Phone-only fares on this route — call free
Flight time details
830 miles nonstop takes roughly 2h 16m 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
- GTF — Great Falls International Airport · Great Falls, United States
- XSI — South Indian Lake Airport · South Indian Lake, 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 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
Near XSI
- YLR · Leaf Rapids Airport45 mi away
- YTH · Thompson Airport79 mi away
- YYL · Lynn Lake Airport82 mi away
- KES · Kelsey Airport105 mi away
Frequently asked questions
How far is GTF from XSI?
The flight distance from Great Falls (GTF) to South Indian Lake (XSI) is 830 miles (1,336 km, 721 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from GTF to XSI?
A nonstop flight takes about 2h 16m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
Are there nonstop flights from GTF to XSI?
Nonstop service on GTF–XSI depends on the season and the day of week. Run the fare search on this page with the nonstop filter applied to see current direct options; when there is no nonstop, a single connection through a carrier hub adds roughly 2–4 hours to the 2h 16m nonstop estimate.
What is the time difference between Great Falls and South Indian Lake?
South Indian Lake is 1 hour ahead of Great Falls.
What is the cheapest way to fly from GTF to XSI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on GTF–XSI that never appear on search engines, with no booking fees.
Why are some GTF to XSI fares phone-only?
Consolidator contracts let us sell certain GTF–XSI tickets below the price airlines permit us to publish online, so those fares can only be quoted over the phone. Call the travel desk and an agent will check phone-only inventory for your dates.