Cheap flights from London to Siem Reap

LON — REP
22 May — 29 May1
Return
1 adult
Economy
From?
To?
Sun 22/5
Sun 29/5

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

How to find the cheapest flight from London to Siem Reap

All the information you need to plan the best LON to REP flight in 2022: compare London to Siem Reap flight prices with the expected peak season, weather and rainfall in Siem Reap.

LON - REP

Price

£671 - £1,270

REP

Temperature

24 - 29 °C

REP

Rainfall

0 - 260 mm

Popular inDecemberHigh demand for flights, 35% potential price rise
Cheapest inSeptemberBest time to find cheap flights, 19% potential price drop
Round-trip from£547From London (LON) to Siem Reap
One-way from£453One-way flight from London (LON) to Siem Reap

What is the cheapest day to fly round-trip 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 £649. For sooner than that we have options available in the next 3 days from £649.

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 £675. Cheapflights users have found deals in the month of September for as cheap as £354. 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 31% on the flight price compared to flying at midday, which is usually more expensive.

Cheap flights from London to Siem Reap in May, June 2022

The best prices found for LON to REP flights in May, June
26 May - 8 Jun
LHR

London Heathrow

REP

Siem Reap

2 stops

45h 35m
REP

Siem Reap

LHR

London Heathrow

2 stops

27h 35m
£844

Multiple Airlines

View Deal

Deal found 16/5/22

14 Jun - 21 Jun
LCY

London City

REP

Siem Reap

2 stops

47h 40m
REP

Siem Reap

LCY

London City

2 stops

30h 15m
£887

Multiple Airlines

View Deal

Deal found 15/5/22

14 Jun - 21 Jun
LHR

London Heathrow

REP

Siem Reap

1 stop

31h 45m
REP

Siem Reap

LHR

London Heathrow

1 stop

36h 45m
£892

Multiple Airlines

View Deal

Deal found 15/5/22

London to Siem Reap 2022 flight deals

Cheap flights to Siem Reap from London found for this year
19 Sep - 26 Sep
LHR

London Heathrow

REP

Siem Reap

1 stop

23h 40m
REP

Siem Reap

LHR

London Heathrow

1 stop

38h 35m
£653

Singapore Airlines

View Deal

Deal found 15/5/22

8 Sep - 16 Sep
LHR

London Heathrow

REP

Siem Reap

1 stop

18h 25m
REP

Siem Reap

LHR

London Heathrow

1 stop

38h 35m
£654

Singapore Airlines

View Deal

Deal found 17/5/22

3 Nov - 12 Nov
LHR

London Heathrow

REP

Siem Reap

1 stop

15h 50m
REP

Siem Reap

LHR

London Heathrow

1 stop

29h 40m
£659

Singapore Airlines

View Deal

Deal found 16/5/22

Cheap Vietnam Airlines flights from London to Siem Reap

5 Nov - 25 Dec
LHR

London Heathrow

REP

Siem Reap

1 stop

23h 30m
REP

Siem Reap

LHR

London Heathrow

2 stops

43h 45m
£775

Vietnam Airlines

View Deal

Deal found 16/5/22

12 Nov - 2 Dec
LHR

London Heathrow

REP

Siem Reap

2 stops

22h 55m
REP

Siem Reap

LHR

London Heathrow

1 stop

19h 45m
£778

Vietnam Airlines

View Deal

Deal found 14/5/22

3 Nov - 12 Nov
LHR

London Heathrow

REP

Siem Reap

1 stop

22h 55m
REP

Siem Reap

LHR

London Heathrow

2 stops

26h 10m
£900

Vietnam Airlines

View Deal

Deal found 16/5/22

Cheap Singapore Airlines flights from London to Siem Reap

19 Sep - 26 Sep
LHR

London Heathrow

REP

Siem Reap

1 stop

23h 40m
REP

Siem Reap

LHR

London Heathrow

1 stop

38h 35m
£653

Singapore Airlines

View Deal

Deal found 15/5/22

3 Nov - 12 Nov
LHR

London Heathrow

REP

Siem Reap

1 stop

15h 50m
REP

Siem Reap

LHR

London Heathrow

1 stop

29h 40m
£659

Singapore Airlines

View Deal

Deal found 16/5/22

30 Aug - 20 Sep
LHR

London Heathrow

REP

Siem Reap

1 stop

18h 25m
REP

Siem Reap

LHR

London Heathrow

1 stop

29h 30m
£675

Singapore Airlines

View Deal

Deal found 14/5/22

Last-minute flights from London to Siem Reap

Late deals on return flights to Siem Reap from London, departing today and this week
26 May - 8 Jun
LHR

London Heathrow

REP

Siem Reap

2 stops

45h 35m
REP

Siem Reap

LHR

London Heathrow

2 stops

27h 35m
£844

Multiple Airlines

View Deal

Deal found 16/5/22

27 May - 6 Jun
LCY

London City

REP

Siem Reap

2 stops

33h 05m
REP

Siem Reap

LCY

London City

2 stops

62h 05m
£910

Multiple Airlines

View Deal

Deal found 16/5/22

27 May - 6 Jun
LHR

London Heathrow

REP

Siem Reap

2 stops

45h 50m
REP

Siem Reap

LHR

London Heathrow

2 stops

51h 00m
£924

Multiple Airlines

View Deal

Deal found 16/5/22

One-way flights to Siem Reap from London

The cheapest one-way flights from London to Siem Reap
9 Jun
LGW

London Gatwick

REP

Siem Reap

3 stops

43h 05m
£303

Multiple Airlines

View Deal

Deal found 17/5/22

25 Oct
STN

London Stansted

REP

Siem Reap

3 stops

23h 35m
£309

Multiple Airlines

View Deal

Deal found 14/5/22

14 Sep
LTN

London Luton

REP

Siem Reap

3 stops

46h 40m
£326

Multiple Airlines

View Deal

Deal found 15/5/22

Related info for your journey

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

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

Siem Reap (REP), located 4.6 mi from the city center, is the airport you fly into when you book flights from London to Siem Reap. 6 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?

Singapore Airlines, China Southern, and Cathay Pacific 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.

Can I find flights from London to Siem Reap for under £700 on Cheapflights?

Yes, there are multiple flights from London to Siem Reap for under £700. The cheapest flight booked recently is on Singapore Airlines for just £653, but on average you can expect to pay £729.

Are there last-minute flights available from London to Siem Reap for under £900?

There are currently 20+ open flights from London to Siem Reap within the next 7 days for less than £900.

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

Our cheapest airline available from London to Siem Reap is Singapore Airlines. Our recent data shows that you can find tickets from as low as £653 on this airline. An additional option worth looking into is Vietnam Airlines, starting at £775. Singapore Airlines is priced at 3% lower than the current average price of a flight leaving 3 months from now.

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

Most travelers choose London Gatwick - Siem Reap, London Heathrow - Siem Reap or London City - 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 £728, our data indicates the cheapest price to be £619. The most popular route (London Gatwick - Siem Reap), is priced around £1,069.

Alternative routes for London to Siem Reap

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

Top 4 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.
AirlineCheapestAverageFlexibilityOn-timeCOVID-19 safety
China SouthernCheapest£372Average£602FlexibilityNo cancel feeOn-time69%COVID-19 safety
Search China Southern flights
Cathay PacificCheapest£553Average£695FlexibilityNo cancel feeOn-time72%COVID-19 safety
Search Cathay Pacific flights
Singapore AirlinesCheapest£655Average£737FlexibilityNo cancel feeOn-time81%COVID-19 safety
Search Singapore Airlines flights
EmiratesCheapest£761Average£808FlexibilityNo cancel feeOn-time75%COVID-19 safety
Search Emirates flights