Cheap flights from Heathrow to Siem Reap

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The best prices from Heathrow to Siem Reap are usually found in September or June, booked 60 days in advance, depart on a Tuesday or Thursday and return on a Monday

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

LHR - REP
Price
£512 - £794

Popular in

August

High demand for flights, 22% potential price rise

Cheapest in

September

Best time to find cheap flights, 17% potential price drop

Average price

£529

Average for round-trip flights in October 2020

Round-trip from

£512

From Heathrow to Siem Reap

Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
What is the cheapest day to fly return from Heathrow to Siem Reap?

Users have found that leaving on a Monday can be a cost-effective option. It’s possible to save up to 14% on your flight compared to booking on days when demand is much higher.

How far in advance should I book a flight from Heathrow 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 Heathrow to Siem Reap 1-2 weeks in advance for as low as £611, or £611 for flights within the next 24 hours.

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

Flights from Heathrow to Siem Reap lean towards being more expensive in December. Prices are generally better when you fly from Heathrow to Siem Reap in September, with the cheapest ticket starting at £333.

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

It’s optimal to fly from Heathrow to Siem Reap in the morning. By choosing this option you can save up to 6% on the cost of your flight, compared to a flight in the afternoon.

Heathrow to Siem Reap 2020 flight deals

Cheap flights to Siem Reap from Heathrow found for this year
14 Dec - 15 Jan
£742pp
LHR
London Heathrow
Multiple airlines
 
1 STOP
REP
Siem Reap
REP
Siem Reap
Multiple Airlines
 
1 STOP
LHR
London Heathrow
25 Dec - 22 Jan
£743pp
LHR
London Heathrow
Multiple airlines
 
1 STOP
REP
Siem Reap
REP
Siem Reap
Multiple Airlines
 
1 STOP
LHR
London Heathrow
16 Dec - 8 Jan
£983pp
LHR
London Heathrow
Multiple airlines
 
1 STOP
REP
Siem Reap
REP
Siem Reap
Multiple Airlines
 
1 STOP
LHR
London Heathrow

Related info for your journey

Useful info, stats and facts about Heathrow to Siem Reap flights.

Flight FAQs

From Heathrow to Siem Reap

Are flight prices decreasing from Heathrow 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 Heathrow 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.

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. China Southern, Cathay Pacific, and Qatar Airways are some of the carriers where you may find flexible cancellation policies. You can use our site to filter for airlines like China Southern with this kind of flexibility.

Can I find flights from Heathrow to Siem Reap for under £768 on Cheapflights?

Yes, there are multiple flights from Heathrow to Siem Reap for under £768. The cheapest flight booked recently is on Multiple Airlines for just £742, but on average you can expect to pay £1,130.

Are there direct flights from Heathrow to Siem Reap for under £768 on Cheapflights?

There are no direct flights from Heathrow to Siem Reap, but Cheapflights can provide you with all the information you need to find the fastest route with the fewest stops.

How long does is the flight from Heathrow to Siem Reap?

Airlines like Vietnam Airlines fly from Heathrow to Siem Reap in about 23h 30m. The time it takes to get you to your destination can typically vary by up to .

What is the cheapest airline to fly from Heathrow to Siem Reap return?

Our cheapest airline available from Heathrow to Siem Reap is Vietnam Airlines. Our recent data shows that you can find tickets from as low as £757 on this airline.

Alternative routes for Heathrow to Siem Reap

Destination information for Siem Reap

Things to know before you go. Useful info for your trip from Heathrow to Siem Reap
Today's exchange rate
£1 = 5,250.96៛

Airports servicing London

Airports servicing Siem Reap

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