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ISN to SYD: distance & flight time
Williston (Sloulin Field International Airport) → Sydney (Sydney Kingsford Smith International Airport)
8,576 mi
13,802 km · 7,453 nm
17h 17m
estimated nonstop flight time
+15h
time difference · heading west
See live ISN→SYD fares Phone-only fares on this route — call free
Flight time details
8,576 miles nonstop takes roughly 17h 17m gate to gate, flying west. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 15-hour time gain when reading arrival times on your ticket.
The two airports
- ISN — Sloulin Field International Airport · Williston, United States
- SYD — Sydney Kingsford Smith International Airport · Sydney, Australia
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 SYD
- BWU · Sydney Bankstown Airport11 mi away
- CDU · Camden Airport29 mi away
- XRH · RAAF Base Richmond33 mi away
- WOL · Wollongong Airport48 mi away
Frequently asked questions
How far is ISN from SYD?
The flight distance from Williston (ISN) to Sydney (SYD) is 8,576 miles (13,802 km, 7,453 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ISN to SYD?
A nonstop flight takes about 17h 17m 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 Williston and Sydney?
Sydney is 15 hours ahead of Williston.
What is the cheapest way to fly from ISN to SYD?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ISN–SYD that never appear on search engines, with no booking fees.