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 2021: compare Heathrow to Siem Reap flight prices with the expected peak season, weather and rainfall in Siem Reap.
LHR - REP
Price
£487 - £732
REP
Temperature
24 - 29 °C
REP
Precipitation
0 - 260 mm

Popular in

December

High demand for flights, 25% potential price rise

Cheapest in

September

Best time to find cheap flights, 11% potential price drop

Average price

£487

Average for round-trip flights in septiembre 2021

Round-trip from

$487

From London Heathrow to Siem Reap

Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
How far in advance should I book a flight from London Heathrow Airport to Siem Reap?

Travellers have found it’s best to book a flight 58 days in advance to save up to 6% 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 58 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 £581, or £581 for flights within the next 24 hours.

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 December. For low rates, September can be a great choice for travel to Siem Reap. Flights to Siem Reap from London Heathrow Airport in September are about £605 on average during September, but can be found for as low as £317.

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.

London Heathrow to Siem Reap 2021 flight deals

Cheap flights to Siem Reap from Heathrow found for this year
5 Dec - 19 Dec
£2,025pp
LHR
London Heathrow
Multiple airlines
   
2 STOPS
REP
Siem Reap
REP
Siem Reap
Multiple Airlines
 
1 STOP
LHR
London Heathrow
29 Dec - 12 Jan
£2,167pp
LHR
London Heathrow
Multiple airlines
   
2 STOPS
REP
Siem Reap
REP
Siem Reap
Multiple Airlines
 
1 STOP
LHR
London Heathrow
29 Dec - 12 Jan
£2,475pp
LHR
London Heathrow
Multiple airlines
   
2 STOPS
REP
Siem Reap
REP
Siem Reap
Multiple Airlines
     
3 STOPS
LHR
London Heathrow

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 centre, is the airport you fly into when you book flights from London Heathrow to Siem Reap. 6 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. Thai Airways, China Southern, and Vietnam Airlines are some of the carriers where you may find flexible cancellation policies. You can use our site to filter for airlines like Thai Airways with this kind of flexibility.

Are flight prices decreasing from London Heathrow Airport to Siem Reap due to COVID-19 (coronavirus)?

At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both London Heathrow Airport and Siem Reap for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.

Can I find flights from London Heathrow Airport to Siem Reap for under £1,600 on Cheapflights?

Yes, there are multiple flights from London Heathrow Airport to Siem Reap for under £1,600. The cheapest flight booked recently is on Multiple Airlines for just £1,551, but on average you can expect to pay £2,635.

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

The cheapest flight price from London Heathrow Airport to Siem Reap is £323. On average you can expect to pay £1,217. The most popular route, (London Heathrow - Siem Reap), can usually be booked for £1,551.

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.

Related searches

Flights to Siem Reap (REP) from Heathrow
Flights to Heathrow Flights to Siem Reap Flights from Heathrow

Hire a Car

Car Rentals in Siem Reap Car Rentals in Cambodia

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 will not be allowed to enter Siem Reap.

COVID-19 testing requirements
Visitors from London Heathrow must present a negative RT-PCR (NAAT) test taken 72 hours before departing to 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 must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to 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 = 5,527.97៛

Airports servicing London

Airports servicing Siem Reap

Top 5 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
£333 £540 No cancel fee 69%
Search China Southern flights
Singapore Airlines
£451 £623 No cancel fee 81%
Search Singapore Airlines flights
Thai Airways
£460 £582 No cancel fee 77%
Search Thai Airways flights
Vietnam Airlines
£480 £626 No cancel fee 81%
Search Vietnam Airlines flights
Cathay Pacific
£499 £640 No cancel fee 72%
Search Cathay Pacific flights
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