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KOS to SEP: distance & flight time
Sihanoukville (Sihanoukville International Airport) → Stephenville (Stephenville Clark Regional Airport)
9,148 mi
14,722 km · 7,949 nm
18h 24m
estimated nonstop flight time
-12h
time difference · heading northeast
See live KOS→SEP fares Phone-only fares on this route — call free
Flight time details
9,148 miles nonstop takes roughly 18h 24m gate to gate, flying northeast. 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
- SEP — Stephenville Clark Regional Airport · Stephenville, 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 SEP
- MWL · Mineral Wells Airport40 mi away
- DFW · Dallas Fort Worth International Airport81 mi away
- BKD · Stephens County Airport54 mi away
- FWH · NAS Fort Worth JRB/Carswell Field57 mi away
Frequently asked questions
How far is KOS from SEP?
The flight distance from Sihanoukville (KOS) to Stephenville (SEP) is 9,148 miles (14,722 km, 7,949 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from KOS to SEP?
A nonstop flight takes about 18h 24m 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 Stephenville?
Stephenville is 12 hours behind Sihanoukville.
What is the cheapest way to fly from KOS to SEP?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on KOS–SEP that never appear on search engines, with no booking fees.