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ISN to KOS: distance & flight time
Williston (Sloulin Field International Airport) → Sihanoukville (Sihanoukville International Airport)
8,047 mi
12,951 km · 6,993 nm
16h 15m
estimated nonstop flight time
+12h
time difference · heading northwest
See live ISN→KOS fares Phone-only fares on this route — call free
Flight time details
8,047 miles nonstop takes roughly 16h 15m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 12-hour time gain when reading arrival times on your ticket.
The two airports
- ISN — Sloulin Field International Airport · Williston, United States
- KOS — Sihanoukville International Airport · Sihanoukville, Cambodia
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 KOS
- PQC · Phu Quoc International Airport37 mi away
- PNH · Phnom Penh International Airport106 mi away
- VKG · Rach Gia Airport110 mi away
- KZC · Kampong Chhnang Airport132 mi away
Frequently asked questions
How far is ISN from KOS?
The flight distance from Williston (ISN) to Sihanoukville (KOS) is 8,047 miles (12,951 km, 6,993 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ISN to KOS?
A nonstop flight takes about 16h 15m 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 Sihanoukville?
Sihanoukville is 12 hours ahead of Williston.
What is the cheapest way to fly from ISN to KOS?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ISN–KOS that never appear on search engines, with no booking fees.