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

China Eastern and Emirates are the most popular carriers 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.

£252 Cheap Flights from Siem Reap to London Heathrow Airport in 2026

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Find the cheapest flights from Siem Reap to London

Round-trip

One-way

Cheap return flights

Enter your travel dates to find the best prices.

19:25 - 12:05

SAI

LHR

23h 40m

2 stops

14:45 - 18:45

LHR

SAI

22h 00m

2 stops

£751Etihad Airways

Thu, 26 Mar - Wed, 6 May

23:50 - 16:10

SAI

LHR

22h 20m

2 stops

09:05 - 12:15

LHR

SAI

21h 10m

2 stops

£791Emirates

Sat, 13 Jun - Tue, 30 Jun

12:55 - 07:05

SAI

LHR

24h 10m

2 stops

09:05 - 12:15

LHR

SAI

21h 10m

2 stops

£793Emirates

Sun, 14 Jun - Tue, 30 Jun

23:50 - 16:10

SAI

LHR

22h 20m

2 stops

20:40 - 21:30

LHR

SAI

18h 50m

2 stops

£815Emirates

Sat, 13 Jun - Mon, 29 Jun

23:50 - 16:10

SAI

LHR

22h 20m

2 stops

09:05 - 12:15

LHR

SAI

21h 10m

2 stops

£816Emirates

Sat, 13 Jun - Wed, 1 Jul

12:55 - 07:05

SAI

LHR

24h 10m

2 stops

20:40 - 21:30

LHR

SAI

18h 50m

2 stops

£816Emirates

Sun, 14 Jun - Mon, 29 Jun

19:30 - 09:10

SAI

LHR

43h 40m

2 stops

18:10 - 12:15

LHR

SAI

36h 05m

2 stops

£829Finnair

Sun, 14 Jun - Wed, 1 Jul

23:50 - 13:50

SAI

LHR

21h 00m

1 stop

16:50 - 21:30

LHR

SAI

22h 40m

2 stops

£853Emirates

Thu, 26 Mar - Wed, 6 May

19:30 - 18:10

SAI

LHR

28h 40m

2 stops

19:50 - 18:20

LHR

SAI

16h 30m

1 stop

£865Multiple Airlines

Sun, 14 Jun - Tue, 30 Jun

19:30 - 18:10

SAI

LHR

28h 40m

2 stops

19:50 - 18:20

LHR

SAI

16h 30m

1 stop

£884Multiple Airlines

Sat, 13 Jun - Tue, 30 Jun

Emirates flights from Siem Reap to London Heathrow Airport

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

Emirates

13 Jun

SAI23:50Siem Reap–Angkor Intl

22h 20m

2 stops

LHR16:10London Heathrow

30 Jun

LHR09:05London Heathrow

21h 10m

2 stops

SAI12:15Siem Reap–Angkor Intl

£791

Emirates

14 Jun

SAI12:55Siem Reap–Angkor Intl

24h 10m

2 stops

LHR07:05London Heathrow

30 Jun

LHR09:05London Heathrow

21h 10m

2 stops

SAI12:15Siem Reap–Angkor Intl

£793

Emirates

13 Jun

SAI23:50Siem Reap–Angkor Intl

22h 20m

2 stops

LHR16:10London Heathrow

29 Jun

LHR20:40London Heathrow

18h 50m

2 stops

SAI21:30Siem Reap–Angkor Intl

£815

Singapore Airlines flights from Siem Reap to London Heathrow Airport

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

Singapore Airlines

14 Jun

SAI16:00Siem Reap–Angkor Intl

29h 45m

1 stop

LHR15:45London Heathrow

30 Jun

LHR09:25London Heathrow

23h 45m

1 stop

SAI15:10Siem Reap–Angkor Intl

£971

Singapore Airlines

14 Jun

SAI16:00Siem Reap–Angkor Intl

22h 00m

1 stop

LHR08:00London Heathrow

1 Jul

LHR09:25London Heathrow

18h 15m

1 stop

SAI09:40Siem Reap–Angkor Intl

£1,157

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 26/3

19:25-12:05

2 stops23h 40m

London Heathrow

Wed 6/5

14:45-18:45

2 stops22h 00m

£751

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Sat 13/6

23:50-16:10

2 stops22h 20m

London Heathrow

Tue 30/6

09:05-12:15

2 stops21h 10m

£791

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Sun 14/6

12:55-07:05

2 stops24h 10m

London Heathrow

Tue 30/6

09:05-12:15

2 stops21h 10m

£793

Fastest return journey

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Sat 13/6

23:50-16:10

2 stops22h 20m

London Heathrow

Mon 29/6

20:40-21:30

2 stops18h 50m

£815

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Sat 13/6

23:50-16:10

2 stops22h 20m

London Heathrow

Wed 1/7

09:05-12:15

2 stops21h 10m

£816

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Sun 14/6

12:55-07:05

2 stops24h 10m

London Heathrow

Mon 29/6

20:40-21:30

2 stops18h 50m

£816

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Sun 14/6

19:30-09:10

2 stops43h 40m

London Heathrow

Wed 1/7

18:10-12:15

2 stops36h 05m

£829

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Thu 26/3

23:50-13:50

1 stop21h 00m

London Heathrow

Wed 6/5

16:50-21:30

2 stops22h 40m

£853

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Sun 14/6

19:30-18:10

2 stops28h 40m

London Heathrow

Tue 30/6

19:50-18:20

1 stop16h 30m

£865

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Sat 13/6

19:30-18:10

2 stops28h 40m

London Heathrow

Tue 30/6

19:50-18:20

1 stop16h 30m

£884

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 66% 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	24h 10m
Direct flights	None

The fastest flight from Siem Reap to London Heathrow Airport takes 24h 10m

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.

Search flight deals

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 24h 10m.
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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Luton

Gatwick

Slough

Maidstone

Northampton

Stratford-upon-Avon

Swindon

Southend-on-Sea

Ipswich

Canterbury

Wembley

Ilford

Poole

Chelmsford

Guildford

Hayes

Dover

Folkestone

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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.