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IAH to KOS: distance & flight time
Houston (George Bush Intercontinental Houston Airport) → Sihanoukville (Sihanoukville International Airport)
9,363 mi
15,068 km · 8,136 nm
18h 50m
estimated nonstop flight time
+12h
time difference · heading northwest
See live IAH→KOS fares Phone-only fares on this route — call free
Flight time details
9,363 miles nonstop takes roughly 18h 50m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 12-hour time gain when reading arrival times on your ticket.
The two airports
- IAH — George Bush Intercontinental Houston Airport · Houston, 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 IAH
- DWH · David Wayne Hooks Memorial Airport14 mi away
- IWS · West Houston Airport23 mi away
- AAP · Andrau Airpark23 mi away
- HOU · William P Hobby Airport24 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 IAH from KOS?
The flight distance from Houston (IAH) to Sihanoukville (KOS) is 9,363 miles (15,068 km, 8,136 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from IAH to KOS?
A nonstop flight takes about 18h 50m 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 Houston and Sihanoukville?
Sihanoukville is 12 hours ahead of Houston.
What is the cheapest way to fly from IAH to KOS?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on IAH–KOS that never appear on search engines, with no booking fees.