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POX to ISN: distance & flight time
Pontoise (Pontoise - Cormeilles-en-Vexin Airport) → Williston (Sloulin Field International Airport)
4,392 mi
7,068 km · 3,816 nm
9h 5m
estimated nonstop flight time
-7h
time difference · heading northwest
See live POX→ISN fares Phone-only fares on this route — call free
Flight time details
4,392 miles nonstop takes roughly 9h 5m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 7-hour time set-back when reading arrival times on your ticket.
The two airports
- POX — Pontoise - Cormeilles-en-Vexin Airport · Pontoise, France
- 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 POX
- CDG · Charles de Gaulle International Airport24 mi away
- LBG · Paris-Le Bourget Airport20 mi away
- VIY · Villacoublay-Vélizy (BA 107) Air Base23 mi away
- CSF · Creil Air Base24 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 POX from ISN?
The flight distance from Pontoise (POX) to Williston (ISN) is 4,392 miles (7,068 km, 3,816 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from POX to ISN?
A nonstop flight takes about 9h 5m 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 Pontoise and Williston?
Williston is 7 hours behind Pontoise.
What is the cheapest way to fly from POX to ISN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on POX–ISN that never appear on search engines, with no booking fees.