Cheap flights from Heathrow to Siem Reap

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How to find the cheapest flight from
Heathrow (LHR) to Siem Reap (REP)

All the information you need to plan the best LHR to REP flight in 2022: compare Heathrow to Siem Reap flight prices with the expected peak season, weather and rainfall in Siem Reap.
How far in advance should I book a flight from London Heathrow Airport to Siem Reap?

Travelers have found it’s best to book a flight 35 days in advance to save up to 28% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 35 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from London Heathrow Airport to Siem Reap 1-2 weeks in advance for as low as £846, or £1,013 for flights within the next 24 hours.

When is the cheapest time to fly from London Heathrow Airport to Siem Reap (LHR - REP)?

When flying from London Heathrow Airport to Siem Reap, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

What is the cheapest month to fly from London Heathrow Airport to Siem Reap?

Due to multiple factors, expect to potentially pay more when booking in November. For low rates, October can be a great choice for travel to Siem Reap. Flights to Siem Reap from London Heathrow Airport in October are about £767 on average during October, but can be found for as low as £570.

Cheap flights from Heathrow to Siem Reap in June, July 2022

The best prices found for LHR to REP flights in June, July
6 Jul - 23 Jul
£1,358pp
LHR
London Heathrow
Multiple airlines
   
2 STOPS
REP
Siem Reap
REP
Siem Reap
Multiple Airlines
   
2 STOPS
LHR
London Heathrow
10 Jul - 19 Jul
£1,395pp
LHR
London Heathrow
Multiple airlines
   
2 STOPS
REP
Siem Reap
REP
Siem Reap
Multiple Airlines
 
1 STOP
LHR
London Heathrow
6 Jul - 24 Jul
£1,411pp
LHR
London Heathrow
Multiple airlines
   
2 STOPS
REP
Siem Reap
REP
Siem Reap
Multiple Airlines
   
2 STOPS
LHR
London Heathrow

London Heathrow to Siem Reap 2022 flight deals

Cheap flights to Siem Reap from Heathrow found for this year
5 Dec - 23 Dec
£712pp
LHR
London Heathrow
Singapore Airlines
 
1 STOP
REP
Siem Reap
REP
Siem Reap
Singapore Airlines
 
1 STOP
LHR
London Heathrow
5 Dec - 20 Dec
£717pp
LHR
London Heathrow
Singapore Airlines
 
1 STOP
REP
Siem Reap
REP
Siem Reap
Singapore Airlines
 
1 STOP
LHR
London Heathrow
6 Dec - 19 Dec
£722pp
LHR
London Heathrow
Singapore Airlines
 
1 STOP
REP
Siem Reap
REP
Siem Reap
Singapore Airlines
 
1 STOP
LHR
London Heathrow

Last-minute flights from Heathrow to Siem Reap

Late deals on return flights to Siem Reap from Heathrow, departing today and this week
6 Jul - 23 Jul
£1,358pp
LHR
London Heathrow
Multiple airlines
   
2 STOPS
REP
Siem Reap
REP
Siem Reap
Multiple Airlines
   
2 STOPS
LHR
London Heathrow
10 Jul - 19 Jul
£1,395pp
LHR
London Heathrow
Multiple airlines
   
2 STOPS
REP
Siem Reap
REP
Siem Reap
Multiple Airlines
 
1 STOP
LHR
London Heathrow
6 Jul - 24 Jul
£1,411pp
LHR
London Heathrow
Multiple airlines
   
2 STOPS
REP
Siem Reap
REP
Siem Reap
Multiple Airlines
   
2 STOPS
LHR
London Heathrow

One-way flights to Siem Reap from London Heathrow

The cheapest one-way flights from Heathrow to Siem Reap
17:55 - 07:45
Etihad Airways
3 stops
55h 50m
LHR - REP
Etihad Airways
£544
Booking.com
07:10 - 13:15
Vietnam Airlines
2 stops
48h 05m
LHR - REP
Vietnam Airlines
02:00 - 10:20
Multiple Airlines
3 stops
26h 20m
LHR - REP
Multiple Airlines
£605
Kiwi.com

Related info for your journey

Useful info, stats and facts about <span class="emphasized">Heathrow</span> to <span class="emphasized">Siem Reap</span> flights.

Flight FAQs

From Heathrow to Siem Reap

What airport do you fly into for flights to Siem Reap from London Heathrow?

Siem Reap (REP), located 4.6 mi from the city center, is the airport you fly into when you book flights from London Heathrow to Siem Reap. 5 airlines have flights to Siem Reap from London Heathrow on a regular basis. Booking flights from London Heathrow to Siem Reap should not be difficult; the airport handles an average of 0 inbound flights from London Heathrow per day.

Which airlines flying from London Heathrow to Siem Reap have flexible cancellations due to COVID-19?

Some of our airline partners flying from London Heathrow to Siem Reap have new flexible policies in place due to COVID-19. Singapore Airlines, China Southern, and Cathay Pacific are some of the carriers where you may find flexible cancellation policies. You can use our site to filter for airlines like Singapore Airlines with this kind of flexibility.

Can I find flights from London Heathrow Airport to Siem Reap for under £800 on Cheapflights?

Yes, there are multiple flights from London Heathrow Airport to Siem Reap for under £800. The cheapest flight booked recently is on Singapore Airlines for just £712, but on average you can expect to pay £755.

Are there last-minute flights available from London Heathrow Airport to Siem Reap for under £1,400?

There are currently 20+ open flights from London Heathrow Airport to Siem Reap within the next 7 days for less than £1,400.

What are the cheapest airlines flying from London Heathrow Airport to Siem Reap round-trip?

Cheapflights users have booked flights from London Heathrow Airport to Siem Reap round-trip from £712. Another airline that can offer you cheap pricing is Vietnam Airlines. These flights start at 22% lower than the current average price 3 months from now.

What are the cheapest flights from London Heathrow Airport to Siem Reap?

The cheapest flight price from London Heathrow Airport to Siem Reap is £836. On average you can expect to pay £2,256. The most popular route, (London Heathrow - Siem Reap), can usually be booked for £722.

What are the most popular airlines that fly from London Heathrow Airport to Siem Reap?

The most popular airlines flying from London Heathrow Airport to Siem Reap are Cathay Pacific, China Southern and China Eastern. Something to consider prior to booking your flight.

COVID Restrictions

View COVID Travel Restrictions for Siem Reap, Cambodia

Do I need a COVID test to fly to Siem Reap from Heathrow?

Information is based on travel restrictions from London Heathrow to Siem Reap

Most visitors from London Heathrow need to provide a negative COVID-19 test result and/or quarantine to enter Siem Reap.

COVID-19 testing requirements
Visitors from London Heathrow are not required to present a negative COVID-19 PCR test or antigen result upon entering Siem Reap.

Quarantine requirements
Visitors from London Heathrow are not required to quarantine after entering Siem Reap.

Do I need a test to fly back to Heathrow from Siem Reap?

Returning to London Heathrow from Siem Reap

COVID-19 testing requirements
Visitors from Siem Reap are not required to present a negative COVID-19 PCR test or antigen result upon entering London Heathrow.

Quarantine requirements
Visitors from Siem Reap are not required to quarantine after entering London Heathrow.

Hide COVID Travel Restrictions for Siem Reap, Cambodia

Alternative routes for Heathrow to Siem Reap

See prices for flight routes from nearby airports that may be better suited for you.

Destination information for Siem Reap

Things to know before you go - useful duration and weather info for your trip from Heathrow to Siem Reap.
Today's exchange rate
£1 = 4,865.32៛

Airports servicing London

Airports servicing Siem Reap

Top 3 airlines flying from London Heathrow to Siem Reap

The chart below displays the airlines Cheapflights users travelling from Heathrow to Siem Reap choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
Airline Cheapest Average Flexibility On-time COVID-19 safety
China Southern
£375 £608 No cancel fee 69%
Search China Southern flights
Cathay Pacific
£561 £720 No cancel fee 72%
Search Cathay Pacific flights
Singapore Airlines
£662 £750 No cancel fee 81%
Search Singapore Airlines flights
Home Asia Cambodia Siem Reap Cheap flights from Heathrow to Siem Reap
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