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NHT to KOS: distance & flight time
Northolt (RAF Northolt) → Sihanoukville (Sihanoukville International Airport)
6,237 mi
10,037 km · 5,420 nm
12h 42m
estimated nonstop flight time
+6h
time difference · heading east
See live NHT→KOS fares Phone-only fares on this route — call free
Flight time details
6,237 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
- NHT — RAF Northolt · Northolt, 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 NHT
- LHR · London Heathrow Airport6 mi away
- LGW · London Gatwick Airport30 mi away
- HYC · Wycombe Air Park17 mi away
- LCY · London City Airport21 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 NHT from KOS?
The flight distance from Northolt (NHT) to Sihanoukville (KOS) is 6,237 miles (10,037 km, 5,420 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from NHT 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.
Are there nonstop flights from NHT to KOS?
Nonstop service on NHT–KOS depends on the season and the day of week. Run the fare search on this page with the nonstop filter applied to see current direct options; when there is no nonstop, a single connection through a carrier hub adds roughly 2–4 hours to the 12h 42m nonstop estimate.
What is the time difference between Northolt and Sihanoukville?
Sihanoukville is 6 hours ahead of Northolt.
What is the cheapest way to fly from NHT to KOS?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on NHT–KOS that never appear on search engines, with no booking fees.
Why are some NHT to KOS fares phone-only?
Consolidator contracts let us sell certain NHT–KOS tickets below the price airlines permit us to publish online, so those fares can only be quoted over the phone. Call the travel desk and an agent will check phone-only inventory for your dates.