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KOS to USN: distance & flight time
Sihanoukville (Sihanoukville International Airport) → Ulsan (Ulsan Airport)
2,363 mi
3,803 km · 2,054 nm
5h 6m
estimated nonstop flight time
+2h
time difference · heading northeast
See live KOS→USN fares Phone-only fares on this route — call free
Flight time details
2,363 miles nonstop takes roughly 5h 6m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 2-hour time gain when reading arrival times on your ticket.
The two airports
- KOS — Sihanoukville International Airport · Sihanoukville, Cambodia
- USN — Ulsan Airport · Ulsan, South Korea
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 USN
- KPO · Pohang Airport (G-815/K-3)28 mi away
- PUS · Gimhae International Airport37 mi away
- TAE · Daegu Airport44 mi away
- CHF · Jinhae Airbase/Airport (G-813/K-10)48 mi away
Frequently asked questions
How far is KOS from USN?
The flight distance from Sihanoukville (KOS) to Ulsan (USN) is 2,363 miles (3,803 km, 2,054 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from KOS to USN?
A nonstop flight takes about 5h 6m 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 Ulsan?
Ulsan is 2 hours ahead of Sihanoukville.
What is the cheapest way to fly from KOS to USN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on KOS–USN that never appear on search engines, with no booking fees.