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KOS to ISN: distance & flight time
Sihanoukville (Sihanoukville International Airport) → Williston (Sloulin Field International Airport)
8,047 mi
12,951 km · 6,993 nm
16h 15m
estimated nonstop flight time
-12h
time difference · heading north
See live KOS→ISN fares Phone-only fares on this route — call free
Flight time details
8,047 miles nonstop takes roughly 16h 15m gate to gate, flying north. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 12-hour time set-back when reading arrival times on your ticket.
The two airports
- KOS — Sihanoukville International Airport · Sihanoukville, Cambodia
- 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 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
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 KOS from ISN?
The flight distance from Sihanoukville (KOS) to Williston (ISN) 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 KOS to ISN?
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 Sihanoukville and Williston?
Williston is 12 hours behind Sihanoukville.
What is the cheapest way to fly from KOS to ISN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on KOS–ISN that never appear on search engines, with no booking fees.