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

Vietnam Airlines and Emirates are the most popular carriers operating from Siem Reap to London Heathrow

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

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

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

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Siem Reap to London Heathrow Airport.

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

The required travel and health documents for your London Heathrow Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at London Heathrow Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

£301 Cheap Flights from Region of 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.

23:50 - 14:25

SAI

LHR

20h 35m

2 stops

09:05 - 12:15

LHR

SAI

21h 10m

2 stops

£778Emirates

Sat, 13 Jun - Tue, 30 Jun

09:40 - 06:55

SAI

LHR

27h 15m

2 stops

19:50 - 18:10

LHR

SAI

16h 20m

1 stop

£809Multiple Airlines

Sun, 14 Jun - Tue, 30 Jun

19:30 - 15:20

SAI

LHR

49h 50m

2 stops

19:50 - 18:10

LHR

SAI

16h 20m

1 stop

£828Multiple Airlines

Sun, 14 Jun - Tue, 30 Jun

12:55 - 07:05

SAI

LHR

24h 10m

2 stops

09:05 - 12:15

LHR

SAI

21h 10m

2 stops

£832Emirates

Sun, 14 Jun - Tue, 30 Jun

18:05 - 17:05

SAI

LHR

29h 00m

1 stop

19:50 - 18:10

LHR

SAI

16h 20m

1 stop

£835Vietnam Airlines

Sun, 14 Jun - Tue, 30 Jun

19:05 - 18:40

SAI

LHR

29h 35m

2 stops

19:50 - 18:10

LHR

SAI

16h 20m

1 stop

£854Multiple Airlines

Sat, 13 Jun - Tue, 30 Jun

18:05 - 17:05

SAI

LHR

29h 00m

1 stop

19:50 - 18:10

LHR

SAI

16h 20m

1 stop

£871Vietnam Airlines

Sun, 14 Jun - Tue, 30 Jun

18:05 - 17:50

SAI

LHR

29h 45m

1 stop

19:50 - 18:10

LHR

SAI

16h 20m

1 stop

£878Vietnam Airlines

Sat, 13 Jun - Tue, 30 Jun

19:30 - 10:15

SAI

LHR

20h 45m

2 stops

19:50 - 18:10

LHR

SAI

16h 20m

1 stop

£886Multiple Airlines

Mon, 15 Jun - Tue, 30 Jun

19:30 - 10:15

SAI

LHR

20h 45m

2 stops

19:50 - 18:10

LHR

SAI

16h 20m

1 stop

£889Multiple Airlines

Mon, 15 Jun - Tue, 30 Jun

Emirates flights from Region of Siem Reap to London Heathrow Airport

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

Emirates

13 Jun

SAI23:50Siem Reap–Angkor Intl

20h 35m

2 stops

LHR14:25London Heathrow

30 Jun

LHR09:05London Heathrow

21h 10m

2 stops

SAI12:15Siem Reap–Angkor Intl

£778

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

£832

Vietnam Airlines flights from Region of Siem Reap to London Heathrow Airport

Our best Vietnam Airlines deals on Region of Siem Reap to London Heathrow Airport flight tickets

Vietnam Airlines

14 Jun

SAI18:05Siem Reap–Angkor Intl

29h 00m

1 stop

LHR17:05London Heathrow

30 Jun

LHR19:50London Heathrow

16h 20m

1 stop

SAI18:10Siem Reap–Angkor Intl

£835

Vietnam Airlines

14 Jun

SAI18:05Siem Reap–Angkor Intl

29h 00m

1 stop

LHR17:05London Heathrow

30 Jun

LHR19:50London Heathrow

16h 20m

1 stop

SAI18:10Siem Reap–Angkor Intl

£871

Vietnam Airlines

13 Jun

SAI18:05Siem Reap–Angkor Intl

29h 45m

1 stop

LHR17:50London Heathrow

30 Jun

LHR19:50London Heathrow

16h 20m

1 stop

SAI18:10Siem Reap–Angkor Intl

£878

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

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Sat 13/6

23:50-14:25

2 stops20h 35m

London Heathrow

Tue 30/6

09:05-12:15

2 stops21h 10m

£778

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Sun 14/6

09:40-06:55

2 stops27h 15m

London Heathrow

Tue 30/6

19:50-18:10

1 stop16h 20m

£809

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Sun 14/6

19:30-15:20

2 stops49h 50m

London Heathrow

Tue 30/6

19:50-18:10

1 stop16h 20m

£828

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

£832

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Sun 14/6

18:05-17:05

1 stop29h 00m

London Heathrow

Tue 30/6

19:50-18:10

1 stop16h 20m

£835

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Sat 13/6

19:05-18:40

2 stops29h 35m

London Heathrow

Tue 30/6

19:50-18:10

1 stop16h 20m

£854

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Sun 14/6

18:05-17:05

1 stop29h 00m

London Heathrow

Tue 30/6

19:50-18:10

1 stop16h 20m

£871

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Sat 13/6

18:05-17:50

1 stop29h 45m

London Heathrow

Tue 30/6

19:50-18:10

1 stop16h 20m

£878

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Mon 15/6

19:30-10:15

2 stops20h 45m

London Heathrow

Tue 30/6

19:50-18:10

1 stop16h 20m

£886

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Mon 15/6

19:30-10:15

2 stops20h 45m

London Heathrow

Tue 30/6

19:50-18:10

1 stop16h 20m

£889

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 Region of 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 Region of Siem Reap to London Heathrow Airport flights?

You could potentially save up to 39% on your flight if you consider stops on a Region of Siem Reap to London Heathrow Airport flight.

Cheap Region of Siem Reap to London Heathrow Airport flight deals and tips

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

Fastest flight time	29h 50m
Direct flights	None

The fastest flight from Region of Siem Reap to London Heathrow Airport takes 29h 50m

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

Search flight deals

When did momondo last update prices for flights from Siem Reap to London Heathrow Airport?
Prices for flights from Siem Reap to London Heathrow Airport are updated daily.
How old do you have to be to fly from Siem Reap to London Heathrow Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Siem Reap to London Heathrow Airport.
What documentation or ID do you need to fly to London Heathrow Airport?
The required travel and health documents for your London Heathrow Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at London Heathrow Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

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Luton

Gatwick

Maidstone

Slough

Northampton

Stratford-upon-Avon

Swindon

Southend-on-Sea

Ipswich

Canterbury

Ilford

Poole

Guildford

Chelmsford

Wembley

Hayes

Dover

Folkestone

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

Finding the right flight to London from Siem Reap is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to London quick and easy, saving you time and money.

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

Yes. momondo allows you to filter the results for Siem Reap to London flights to just show those with flexible booking policies.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Siem Reap to London.

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Price alerts on flights to London from Siem Reap are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.