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LHR to KOS: distance & flight time
London (London Heathrow Airport) → Sihanoukville (Sihanoukville International Airport)
6,240 mi
10,043 km · 5,423 nm
12h 42m
estimated nonstop flight time
+6h
time difference · heading east
See live LHR→KOS fares Phone-only fares on this route — call free
Flight time details
6,240 miles nonstop takes roughly 12h 42m gate to gate, flying east. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 6-hour time gain when reading arrival times on your ticket.
The two airports
- LHR — London Heathrow Airport · London, United Kingdom
- 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 LHR
- LGW · London Gatwick Airport25 mi away
- NHT · RAF Northolt6 mi away
- HYC · Wycombe Air Park18 mi away
- FAB · Farnborough Airport19 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 LHR from KOS?
The flight distance from London (LHR) to Sihanoukville (KOS) is 6,240 miles (10,043 km, 5,423 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from LHR to KOS?
A nonstop flight takes about 12h 42m 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 London and Sihanoukville?
Sihanoukville is 6 hours ahead of London.
What is the cheapest way to fly from LHR to KOS?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on LHR–KOS that never appear on search engines, with no booking fees.