Need help booking?
Unpublished phone-only deals available
YSM to XSI: distance & flight time
Fort Smith (Fort Smith Airport) → South Indian Lake (South Indian Lake Airport)
521 mi
839 km · 453 nm
1h 36m
estimated nonstop flight time
+1h
time difference · heading east
See live YSM→XSI fares Phone-only fares on this route — call free
Flight time details
521 miles nonstop takes roughly 1h 36m gate to gate, flying east. 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
- YSM — Fort Smith Airport · Fort Smith, Canada
- 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 YSM
- YPY · Fort Chipewyan Airport92 mi away
- YFR · Fort Resolution Airport99 mi away
- YBE · Uranium City Airport125 mi away
- YHY · Hay River / Merlyn Carter Airport142 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 YSM from XSI?
The flight distance from Fort Smith (YSM) to South Indian Lake (XSI) is 521 miles (839 km, 453 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from YSM to XSI?
A nonstop flight takes about 1h 36m 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 Fort Smith and South Indian Lake?
South Indian Lake is 1 hour ahead of Fort Smith.
What is the cheapest way to fly from YSM to XSI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on YSM–XSI that never appear on search engines, with no booking fees.