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REP to ISN: distance & flight time
Siem-reap (Siem Reap International Airport) → Williston (Sloulin Field International Airport)
7,859 mi
12,648 km · 6,830 nm
15h 53m
estimated nonstop flight time
-12h
time difference · heading north
See live REP→ISN fares Phone-only fares on this route — call free
Flight time details
7,859 miles nonstop takes roughly 15h 53m 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
- REP — Siem Reap International Airport · Siem-reap, 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 REP
- BBM · Battambang Airport45 mi away
- KZC · Kampong Chhnang Airport95 mi away
- PXR · Surin Airport103 mi away
- TDX · Trat Airport128 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 REP from ISN?
The flight distance from Siem-reap (REP) to Williston (ISN) is 7,859 miles (12,648 km, 6,830 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from REP to ISN?
A nonstop flight takes about 15h 53m 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 Siem-reap and Williston?
Williston is 12 hours behind Siem-reap.
What is the cheapest way to fly from REP to ISN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on REP–ISN that never appear on search engines, with no booking fees.