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WBU to KOS: distance & flight time
Boulder (Boulder Municipal Airport) → Sihanoukville (Sihanoukville International Airport)
8,481 mi
13,649 km · 7,370 nm
17h 6m
estimated nonstop flight time
+13h
time difference · heading northwest
See live WBU→KOS fares Phone-only fares on this route — call free
Flight time details
8,481 miles nonstop takes roughly 17h 6m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 13-hour time gain when reading arrival times on your ticket.
The two airports
- WBU — Boulder Municipal Airport · Boulder, United States
- KOS — Sihanoukville International Airport · Sihanoukville, Cambodia
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 WBU
- DEN · Denver International Airport32 mi away
- BJC · Rocky Mountain Metropolitan Airport11 mi away
- FNL · Northern Colorado Regional Airport31 mi away
- BFK · Buckley Air Force Base34 mi away
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
Frequently asked questions
How far is WBU from KOS?
The flight distance from Boulder (WBU) to Sihanoukville (KOS) is 8,481 miles (13,649 km, 7,370 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from WBU to KOS?
A nonstop flight takes about 17h 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 Boulder and Sihanoukville?
Sihanoukville is 13 hours ahead of Boulder.
What is the cheapest way to fly from WBU to KOS?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on WBU–KOS that never appear on search engines, with no booking fees.