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YSD to ISN: distance & flight time
Suffield (Suffield Heliport) → Williston (Sloulin Field International Airport)
369 mi
595 km · 321 nm
1h 26m
estimated nonstop flight time
+1h
time difference · heading east
See live YSD→ISN fares Phone-only fares on this route — call free
Flight time details
369 miles nonstop takes roughly 1h 26m 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
- YSD — Suffield Heliport · Suffield, Canada
- ISN — Sloulin Field International Airport · Williston, 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 YSD
- YXH · Medicine Hat Airport27 mi away
- YQL · Lethbridge County Airport84 mi away
- YKY · Kindersley Airport123 mi away
- YCT · Coronation Airport125 mi away
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
Frequently asked questions
How far is YSD from ISN?
The flight distance from Suffield (YSD) to Williston (ISN) is 369 miles (595 km, 321 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from YSD to ISN?
A nonstop flight takes about 1h 26m 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 YSD to ISN?
Nonstop service on YSD–ISN 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 1h 26m nonstop estimate.
What is the time difference between Suffield and Williston?
Williston is 1 hour ahead of Suffield.
What is the cheapest way to fly from YSD to ISN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on YSD–ISN that never appear on search engines, with no booking fees.
Why are some YSD to ISN fares phone-only?
Consolidator contracts let us sell certain YSD–ISN 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.