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KOS to APA: distance & flight time
Sihanoukville (Sihanoukville International Airport) → Denver (Centennial Airport)
8,519 mi
13,711 km · 7,403 nm
17h 10m
estimated nonstop flight time
-13h
time difference · heading northeast
See live KOS→APA fares Phone-only fares on this route — call free
Flight time details
8,519 miles nonstop takes roughly 17h 10m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 13-hour time set-back when reading arrival times on your ticket.
The two airports
- KOS — Sihanoukville International Airport · Sihanoukville, Cambodia
- APA — Centennial Airport · Denver, 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 APA
- DEN · Denver International Airport22 mi away
- BFK · Buckley Air Force Base10 mi away
- BJC · Rocky Mountain Metropolitan Airport27 mi away
- WBU · Boulder Municipal Airport38 mi away
Frequently asked questions
How far is KOS from APA?
The flight distance from Sihanoukville (KOS) to Denver (APA) is 8,519 miles (13,711 km, 7,403 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from KOS to APA?
A nonstop flight takes about 17h 10m 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 Denver?
Denver is 13 hours behind Sihanoukville.
What is the cheapest way to fly from KOS to APA?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on KOS–APA that never appear on search engines, with no booking fees.