What is the cheapest airline that flies from Siem Reap–Angkor Intl to London Heathrow?

China Eastern is the most popular carrier operating from Siem Reap–Angkor Intl to London Heathrow

When did momondo last update prices for flights from Siem Reap–Angkor Intl Airport to London Heathrow Airport?

Prices for flights from Siem Reap–Angkor Intl Airport to London Heathrow Airport are updated daily.

How old do you have to be to fly from Siem Reap–Angkor Intl Airport to London Heathrow Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Siem Reap–Angkor Intl Airport to London Heathrow Airport.

What documentation or ID do you need to fly to London Heathrow Airport?

The travel and health documents required for your trip to London Heathrow Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at London Heathrow Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

£334 Cheap Flights from Siem Reap to London Heathrow Airport in 2026

Voted winner of Europe's Best Travel App 2023

Find the cheapest flights from Siem Reap to London

Return

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

09:40 - 12:45

SAI

LHR

33h 05m

2 stops

21:45 - 12:15

LHR

SAI

32h 30m

2 stops

£774Etihad Airways

Thu, 3 Sep - Thu, 17 Sep

09:50 - 05:55

SAI

LHR

51h 05m

2 stops

20:05 - 08:45

LHR

SAI

29h 40m

2 stops

£787Multiple Airlines

Tue, 8 Dec - Sat, 2 Jan

19:35 - 20:40

SAI

LHR

31h 05m

2 stops

10:20 - 09:00

LHR

SAI

40h 40m

2 stops

£792Finnair

Thu, 3 Sep - Thu, 17 Sep

17:55 - 07:15

SAI

LHR

20h 20m

1 stop

08:25 - 08:45

LHR

SAI

41h 20m

2 stops

£858Multiple Airlines

Tue, 8 Dec - Sat, 2 Jan

09:40 - 07:00

SAI

LHR

27h 20m

2 stops

18:55 - 18:20

LHR

SAI

17h 25m

1 stop

£907Multiple Airlines

Thu, 3 Sep - Thu, 17 Sep

19:35 - 20:40

SAI

LHR

31h 05m

2 stops

20:45 - 17:50

LHR

SAI

39h 05m

2 stops

£934Multiple Airlines

Thu, 2 Jul - Thu, 9 Jul

19:35 - 07:15

SAI

LHR

17h 40m

1 stop

18:55 - 18:20

LHR

SAI

17h 25m

1 stop

£946Multiple Airlines

Thu, 3 Sep - Thu, 17 Sep

09:40 - 19:15

SAI

LHR

15h 35m

1 stop

19:30 - 18:55

LHR

SAI

17h 25m

2 stops

£949Multiple Airlines

Thu, 3 Sep - Thu, 17 Sep

14:50 - 07:15

SAI

LHR

23h 25m

3 stops

08:25 - 08:45

LHR

SAI

41h 20m

2 stops

£967Multiple Airlines

Tue, 8 Dec - Sat, 2 Jan

12:55 - 07:15

SAI

LHR

24h 20m

1 stop

12:30 - 09:00

LHR

SAI

14h 30m

1 stop

£997Multiple Airlines

Thu, 3 Sep - Thu, 17 Sep

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Etihad Airways flights from Siem Reap to London Heathrow Airport

Our best Etihad Airways deals on Siem Reap to London Heathrow Airport flight tickets

Etihad Airways

3 Sept

SAI09:40Siem Reap–Angkor Intl

33h 05m

2 stops

LHR12:45London Heathrow

17 Sept

LHR21:45London Heathrow

32h 30m

2 stops

SAI12:15Siem Reap–Angkor Intl

£774

Etihad Airways

21 Jun

SAI12:55Siem Reap–Angkor Intl

32h 10m

2 stops

LHR15:05London Heathrow

27 Jun

LHR21:45London Heathrow

29h 15m

2 stops

SAI09:00Siem Reap–Angkor Intl

£803

Finnair flights from Siem Reap to London Heathrow Airport

Our best Finnair deals on Siem Reap to London Heathrow Airport flight tickets

Finnair

3 Sept

SAI19:35Siem Reap–Angkor Intl

31h 05m

2 stops

LHR20:40London Heathrow

17 Sept

LHR10:20London Heathrow

40h 40m

2 stops

SAI09:00Siem Reap–Angkor Intl

£792

Finnair

8 Dec

SAI19:25Siem Reap–Angkor Intl

44h 45m

2 stops

LHR09:10London Heathrow

2 Jan

LHR16:15London Heathrow

37h 25m

2 stops

SAI12:40Siem Reap–Angkor Intl

£1,712

momondo Fare Finder

Use the filters below to find and compare flights from Siem Reap to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Thu 3/9

09:40-12:45

2 stops33h 05m

London Heathrow

Thu 17/9

21:45-12:15

2 stops32h 30m

£774

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Tue 8/12

09:50-05:55

2 stops51h 05m

London Heathrow

Sat 2/1

20:05-08:45

2 stops29h 40m

£787

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Thu 3/9

19:35-20:40

2 stops31h 05m

London Heathrow

Thu 17/9

10:20-09:00

2 stops40h 40m

£792

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Tue 8/12

17:55-07:15

1 stop20h 20m

London Heathrow

Sat 2/1

08:25-08:45

2 stops41h 20m

£858

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Thu 3/9

09:40-07:00

2 stops27h 20m

London Heathrow

Thu 17/9

18:55-18:20

1 stop17h 25m

£907

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Thu 2/7

19:35-20:40

2 stops31h 05m

London Heathrow

Thu 9/7

20:45-17:50

2 stops39h 05m

£934

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Thu 3/9

19:35-07:15

1 stop17h 40m

London Heathrow

Thu 17/9

18:55-18:20

1 stop17h 25m

£946

Fastest return journey

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Thu 3/9

09:40-19:15

1 stop15h 35m

London Heathrow

Thu 17/9

19:30-18:55

2 stops17h 25m

£949

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Tue 8/12

14:50-07:15

3 stops23h 25m

London Heathrow

Sat 2/1

08:25-08:45

2 stops41h 20m

£967

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Thu 3/9

12:55-07:15

1 stop24h 20m

London Heathrow

Thu 17/9

12:30-09:00

1 stop14h 30m

£997

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Siem Reap to London Heathrow Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Can stopping save me money on Siem Reap to London Heathrow Airport flights?

You could potentially save up to 6% on your flight if you consider stops on a Siem Reap to London Heathrow Airport flight.

When to book flights from Siem Reap to London Heathrow Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Siem Reap to London Heathrow Airport according to our flight data. Find out which month and days have the cheapest flights.

Estimated return price

Cheap Siem Reap to London Heathrow Airport (SAI to LHR) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Siem Reap to London Heathrow Airport

Fastest flight time	31h 05m
Direct flights	None

The fastest flight from Siem Reap to London Heathrow Airport takes 31h 05m

There are no direct flights from Siem Reap to London Heathrow Airport. There are no popular flight routes from Siem Reap to London Heathrow Airport.

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Frequently asked questions about flying from Siem Reap to London Heathrow Airport

How far is Siem Reap–Angkor Intl to London Heathrow by plane?
There are 6091.7 mi between Siem Reap–Angkor Intl and London Heathrow. A reasonable flight in good conditions will take 31h 05m.
When did momondo last update prices for flights from Siem Reap–Angkor Intl Airport to London Heathrow Airport?
Prices for flights from Siem Reap–Angkor Intl Airport to London Heathrow Airport are updated daily.
How old do you have to be to fly from Siem Reap–Angkor Intl Airport to London Heathrow Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Siem Reap–Angkor Intl Airport to London Heathrow Airport.
What documentation or ID do you need to fly to London Heathrow Airport?
The travel and health documents required for your trip to London Heathrow Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at London Heathrow Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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Slough

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Maidstone

Northampton

Ipswich

Swindon

Ilford

Canterbury

Poole

Folkestone

Guildford

Hayes

Bedford

Chichester

Why use momondo?

Why should I use momondo to find a flight deal from Siem Reap to London?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Siem Reap to London for you.

Can I find flights from Siem Reap to London with flexible booking policies on momondo?

Flights from Siem Reap to London with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Siem Reap to London?

Once all potential Siem Reap to London flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Siem Reap to London right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to London from Siem Reap. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.