Need help booking?
Unpublished phone-only deals available
REP to LHR: distance & flight time
Siem-reap (Siem Reap International Airport) → London (London Heathrow Airport)
6,092 mi
9,803 km · 5,293 nm
12h 25m
estimated nonstop flight time
-6h
time difference · heading northwest
See live REP→LHR fares Phone-only fares on this route — call free
Flight time details
6,092 miles nonstop takes roughly 12h 25m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 6-hour time set-back when reading arrival times on your ticket.
The two airports
- REP — Siem Reap International Airport · Siem-reap, Cambodia
- LHR — London Heathrow Airport · London, United Kingdom
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 REP
- BBM · Battambang Airport45 mi away
- KZC · Kampong Chhnang Airport95 mi away
- PXR · Surin Airport103 mi away
- TDX · Trat Airport128 mi away
Near LHR
- LGW · London Gatwick Airport25 mi away
- NHT · RAF Northolt6 mi away
- HYC · Wycombe Air Park18 mi away
- FAB · Farnborough Airport19 mi away
Frequently asked questions
How far is REP from LHR?
The flight distance from Siem-reap (REP) to London (LHR) is 6,092 miles (9,803 km, 5,293 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from REP to LHR?
A nonstop flight takes about 12h 25m 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 Siem-reap and London?
London is 6 hours behind Siem-reap.
What is the cheapest way to fly from REP to LHR?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on REP–LHR that never appear on search engines, with no booking fees.