Cheap flights from London to Siem Reap

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Siem Reap (REP)
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The best prices from London to Siem Reap are usually found in September or May, booked 59 days in advance, depart on a Tuesday or Monday and return on a Monday

How to find the cheapest flight from
London (LON) to Siem Reap (REP)

All the information you need to plan the best LON to REP flight in 2021: compare London to Siem Reap flight prices with the expected peak season, weather and rainfall in Siem Reap.
LON - REP
Price
£491 - £928
REP
Temperature
24 - 29 °C
REP
Precipitation
0 - 260 mm

Popular in

December

High demand for flights, 35% potential price rise

Cheapest in

September

Best time to find cheap flights, 19% potential price drop

Average price

£491

Average for round-trip flights in settembre 2021

Round-trip from

€491

From London All airports (LON) 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 London to Siem Reap?

Users have found that flying from London to Siem Reap on a Friday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

How far in advance should I book a flight from London to Siem Reap?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 58 days in advance, which can save you up to 6% on flights from London to Siem Reap compared to booking the week you need them. Waiting 58 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at £582. For sooner than that we have options available in the next 3 days from £582.

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

September can be a great time to fly to Siem Reap from London with a flight ticket averaging about £605. Cheapflights users have found deals in the month of September for as cheap as £317. The most expensive prices can be found in the month of December.

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

It’s typically best to fly out from London to Siem Reap in the morning. Doing so could potentially save you 26% on the flight price compared to flying at midday, which is usually more expensive.

London to Siem Reap 2021 flight deals

Cheap flights to Siem Reap from London found for this year
5 Dec - 19 Dec
£2,026pp
LHR
London Heathrow
Multiple airlines
   
2 STOPS
REP
Siem Reap
REP
Siem Reap
Multiple Airlines
 
1 STOP
LHR
London Heathrow
29 Dec - 12 Jan
£2,169pp
LHR
London Heathrow
Multiple airlines
   
2 STOPS
REP
Siem Reap
REP
Siem Reap
Multiple Airlines
 
1 STOP
LHR
London Heathrow
29 Dec - 12 Jan
£2,477pp
LHR
London Heathrow
Multiple airlines
   
2 STOPS
REP
Siem Reap
REP
Siem Reap
Multiple Airlines
     
3 STOPS
LHR
London Heathrow

One-way flights to Siem Reap from London

The cheapest one-way flights from London to Siem Reap
06:15 - 12:35
Multiple Airlines
1 stop
23h 20m
LHR - REP
Multiple Airlines
£8,613
DreamWorldTravel
15:10 - 04:45
Multiple Airlines
2 stops
30h 35m
LHR - REP
Multiple Airlines
£2,051
DreamWorldTravel

Related info for your journey

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

Flight FAQs

From London to Siem Reap

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

Siem Reap (REP), located 4.6 mi from the city centre, is the airport you fly into when you book flights from London to Siem Reap. 7 airlines have flights to Siem Reap from London on a regular basis. Booking flights from London to Siem Reap should not be difficult; the airport handles an average of 0 inbound flights from London per day.

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

Thai Airways, Vietnam Airlines, and China Southern are some of the carriers that may have flexible cancellation policies. You can use our site to filter for other airlines that may also have this kind of flexibility.

Are flight prices decreasing from London 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 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 to Siem Reap for under £1,600 on Cheapflights?

Yes, there are multiple flights from London to Siem Reap for under £1,600. The cheapest flight booked recently is on Multiple Airlines for just £1,552, but on average you can expect to pay £2,818.

What are the most popular routes from London to Siem Reap?

Most travellers choose London Heathrow - Siem Reap, London City - Siem Reap or London Gatwick - Siem Reap when deciding on the best route from London to Siem Reap.

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

When booking a flight from London to Siem Reap, you may want to consider flying on Cathay Pacific, China Southern or China Eastern as they are the most popular for this route.

What are the cheapest flights from London to Siem Reap?

Looking for the cheapest flight from London to Siem Reap? While on average our users pay £1,218, our data indicates the cheapest price to be £323. The most popular route (London Heathrow - Siem Reap), is priced around £3,029.

COVID Restrictions

View COVID Travel Restrictions for Siem Reap, Cambodia

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

Information is based on travel restrictions from London to Siem Reap

Most visitors from London will not be allowed to enter Siem Reap.

COVID-19 testing requirements
Visitors from London must present a negative RT-PCR (NAAT) test taken 72 hours before departing to Siem Reap.

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

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

Returning to London 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.

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

Hide COVID Travel Restrictions for Siem Reap, Cambodia

Alternative routes for London 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 London to Siem Reap.
Today's exchange rate
£1 = 5,533.19៛

Airports servicing London

Gatwick (LGW)
Stansted (STN)
London City (LCY)
Luton (LTN)
Southend (SEN)

Airports servicing Siem Reap

Top 6 airlines flying from London to Siem Reap

The chart below displays the airlines Cheapflights users travelling from London 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 £624 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
£496 £623 No cancel fee 72%
Search Cathay Pacific flights
Emirates
£683 £725 No cancel fee 75%
Search Emirates flights
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