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HIO to KOS: distance & flight time
Hillsboro (Portland Hillsboro Airport) → Sihanoukville (Sihanoukville International Airport)
7,601 mi
12,232 km · 6,605 nm
15h 22m
estimated nonstop flight time
+14h
time difference · heading northwest
See live HIO→KOS fares Phone-only fares on this route — call free
Flight time details
7,601 miles nonstop takes roughly 15h 22m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 14-hour time gain when reading arrival times on your ticket.
The two airports
- HIO — Portland Hillsboro Airport · Hillsboro, 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 HIO
- PDX · Portland International Airport17 mi away
- TTD · Portland Troutdale Airport27 mi away
- KLS · Southwest Washington Regional Airport40 mi away
- OTK · Tillamook Airport43 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 HIO from KOS?
The flight distance from Hillsboro (HIO) to Sihanoukville (KOS) is 7,601 miles (12,232 km, 6,605 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from HIO to KOS?
A nonstop flight takes about 15h 22m 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 Hillsboro and Sihanoukville?
Sihanoukville is 14 hours ahead of Hillsboro.
What is the cheapest way to fly from HIO to KOS?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on HIO–KOS that never appear on search engines, with no booking fees.