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ISN to YST: distance & flight time
Williston (Sloulin Field International Airport) → St. Theresa Point (St. Theresa Point Airport)
546 mi
879 km · 475 nm
1h 39m
estimated nonstop flight time
Same time
time difference · heading northeast
See live ISN→YST fares Phone-only fares on this route — call free
Flight time details
546 miles nonstop takes roughly 1h 39m 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
- ISN — Sloulin Field International Airport · Williston, United States
- YST — St. Theresa Point Airport · St. Theresa Point, 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 ISN
- SDY · Sidney - Richland Regional Airport41 mi away
- YEN · Estevan Airport78 mi away
- OLF · L M Clayton Airport89 mi away
- GDV · Dawson Community Airport90 mi away
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
Frequently asked questions
How far is ISN from YST?
The flight distance from Williston (ISN) to St. Theresa Point (YST) is 546 miles (879 km, 475 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ISN to YST?
A nonstop flight takes about 1h 39m 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 ISN to YST?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ISN–YST that never appear on search engines, with no booking fees.