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.

£241 Cheap Flights from Region of Siem Reap to London Heathrow Airport in 2026/27

Find the cheapest flights from Siem Reap to London

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One-way

Cheap return flights

Enter your travel dates to find the best prices.

21:05 - 17:30SAI Siem Reap–Angkor Intl-LHR London Heathrow

27h 25m2 stops Kunming Changshui Shanghai Pu Dong

21:00 - 20:05LHR London Heathrow-SAI Siem Reap–Angkor Intl

40h 05m2 stops Shanghai Pu Dong Kunming Changshui

£683China Eastern

Thu, 28 Jan - Sun, 28 Feb

23:50 - 16:10SAI Siem Reap–Angkor Intl-LHR London Heathrow

22h 20m2 stops Bangkok Suvarnabhumi Dubai Intl

16:50 - 21:30LHR London Heathrow-SAI Siem Reap–Angkor Intl

22h 40m2 stops Dubai Intl Bangkok Suvarnabhumi

£686Emirates

Tue, 4 May - Wed, 19 May

21:05 - 17:30SAI Siem Reap–Angkor Intl-LHR London Heathrow

27h 25m2 stops Kunming Changshui Shanghai Pu Dong

21:00 - 20:05LHR London Heathrow-SAI Siem Reap–Angkor Intl

40h 05m3 stops Shanghai Pu Dong Fuzhou Kunming Changshui

£705China Eastern

Thu, 28 Jan - Sun, 28 Feb

21:05 - 17:30SAI Siem Reap–Angkor Intl-LHR London Heathrow

51h 25m2 stops Kunming Changshui Shanghai Pu Dong

21:00 - 20:05LHR London Heathrow-SAI Siem Reap–Angkor Intl

40h 05m2 stops Shanghai Pu Dong Kunming Changshui

£706China Eastern

Sat, 26 Dec - Sun, 17 Jan

13:20 - 11:40SAI Siem Reap–Angkor Intl-LHR London Heathrow

29h 20m2 stops Bangkok Suvarnabhumi Dubai Intl

20:40 - 12:15LHR London Heathrow-SAI Siem Reap–Angkor Intl

33h 35m2 stops Dubai Intl Bangkok Suvarnabhumi

£753Emirates

Tue, 2 Mar - Fri, 2 Apr

13:20 - 13:50SAI Siem Reap–Angkor Intl-LHR London Heathrow

31h 30m2 stops Bangkok Suvarnabhumi Dubai Intl

16:50 - 12:15LHR London Heathrow-SAI Siem Reap–Angkor Intl

37h 25m2 stops Dubai Intl Bangkok Suvarnabhumi

£776Emirates

Mon, 1 Mar - Fri, 2 Apr

23:50 - 20:00SAI Siem Reap–Angkor Intl-LHR London Heathrow

27h 10m2 stops Bangkok Suvarnabhumi Dubai Intl

16:50 - 21:30LHR London Heathrow-SAI Siem Reap–Angkor Intl

22h 40m2 stops Dubai Intl Bangkok Suvarnabhumi

£776Emirates

Thu, 4 Mar - Fri, 2 Apr

23:50 - 20:00SAI Siem Reap–Angkor Intl-LHR London Heathrow

27h 10m2 stops Bangkok Suvarnabhumi Dubai Intl

20:40 - 12:15LHR London Heathrow-SAI Siem Reap–Angkor Intl

33h 35m2 stops Dubai Intl Bangkok Suvarnabhumi

£776Emirates

Sat, 27 Feb - Fri, 2 Apr

20:30 - 07:15SAI Siem Reap–Angkor Intl-LHR London Heathrow

17h 45m1 stop Hanoi Noibai

21:00 - 15:50LHR London Heathrow-SAI Siem Reap–Angkor Intl

35h 50m2 stops Shanghai Pu Dong Ho Chi Minh City

£791Multiple Airlines

Sat, 26 Dec - Sun, 17 Jan

12:55 - 19:10SAI Siem Reap–Angkor Intl-LHR London Heathrow

36h 15m2 stops Bangkok Suvarnabhumi Muscat Seeb

20:50 - 12:15LHR London Heathrow-SAI Siem Reap–Angkor Intl

33h 25m2 stops Muscat Seeb Bangkok Suvarnabhumi

£830Multiple Airlines

Tue, 4 May - Tue, 18 May

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China Eastern flights from Region of Siem Reap to London Heathrow Airport

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

China Eastern

28 Jan

SAI21:05Siem Reap–Angkor Intl

27h 25m

2 stops

LHR17:30London Heathrow

28 Feb

LHR21:00London Heathrow

40h 05m

2 stops

SAI20:05Siem Reap–Angkor Intl

£683

China Eastern

28 Jan

SAI21:05Siem Reap–Angkor Intl

27h 25m

2 stops

LHR17:30London Heathrow

28 Feb

LHR21:00London Heathrow

40h 05m

3 stops

SAI20:05Siem Reap–Angkor Intl

£705

China Eastern

26 Dec

SAI21:05Siem Reap–Angkor Intl

51h 25m

2 stops

LHR17:30London Heathrow

17 Jan

LHR21:00London Heathrow

40h 05m

2 stops

SAI20:05Siem Reap–Angkor Intl

£706

SWISS flights from Region of Siem Reap to London Heathrow Airport

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

SWISS

27 Jan

SAI16:50Siem Reap–Angkor Intl

22h 15m

2 stops

LHR08:05London Heathrow

28 Oct

LHR13:50London Heathrow

22h 55m

2 stops

SAI18:45Siem Reap–Angkor Intl

£1,026

SWISS

3 May

SAI09:40Siem Reap–Angkor Intl

18h 05m

2 stops

LHR21:45London Heathrow

20 May

LHR12:10London Heathrow

24h 35m

2 stops

SAI18:45Siem Reap–Angkor Intl

£1,041

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 Siem Reap–Angkor Intl - LHR London Heathrow

SAILHR

Siem Reap–Angkor Intl

Thu 28/1

21:05-17:30

2 stops27h 25m

London Heathrow

Sun 28/2

21:00-20:05

2 stops40h 05m

£683

Fastest return journey

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LHR London Heathrow

SAILHR

Siem Reap–Angkor Intl

Tue 4/5

23:50-16:10

2 stops22h 20m

London Heathrow

Wed 19/5

16:50-21:30

2 stops22h 40m

£686

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LHR London Heathrow

SAILHR

Siem Reap–Angkor Intl

Thu 28/1

21:05-17:30

2 stops27h 25m

London Heathrow

Sun 28/2

21:00-20:05

3 stops40h 05m

£705

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LHR London Heathrow

SAILHR

Siem Reap–Angkor Intl

Sat 26/12

21:05-17:30

2 stops51h 25m

London Heathrow

Sun 17/1

21:00-20:05

2 stops40h 05m

£706

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LHR London Heathrow

SAILHR

Siem Reap–Angkor Intl

Tue 2/3

13:20-11:40

2 stops29h 20m

London Heathrow

Fri 2/4

20:40-12:15

2 stops33h 35m

£753

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LHR London Heathrow

SAILHR

Siem Reap–Angkor Intl

Mon 1/3

13:20-13:50

2 stops31h 30m

London Heathrow

Fri 2/4

16:50-12:15

2 stops37h 25m

£776

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LHR London Heathrow

SAILHR

Siem Reap–Angkor Intl

Thu 4/3

23:50-20:00

2 stops27h 10m

London Heathrow

Fri 2/4

16:50-21:30

2 stops22h 40m

£776

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LHR London Heathrow

SAILHR

Siem Reap–Angkor Intl

Sat 27/2

23:50-20:00

2 stops27h 10m

London Heathrow

Fri 2/4

20:40-12:15

2 stops33h 35m

£776

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LHR London Heathrow

SAILHR

Siem Reap–Angkor Intl

Sat 26/12

20:30-07:15

1 stop17h 45m

London Heathrow

Sun 17/1

21:00-15:50

2 stops35h 50m

£791

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LHR London Heathrow

SAILHR

Siem Reap–Angkor Intl

Tue 4/5

12:55-19:10

2 stops36h 15m

London Heathrow

Tue 18/5

20:50-12:15

2 stops33h 25m

£830

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

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

You could potentially save up to 43% 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

Best price found	£241
Fastest flight time	22h 20m
Direct flights	None

The best one-way flight to London Heathrow Airport from Region of Siem Reap in the past 72 hours is £241. The best return flight deal from Region of Siem Reap to London Heathrow Airport found on momondo in the last 72 hours is £683.

The fastest flight from Region of Siem Reap to London Heathrow Airport takes 22h 20m

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

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

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

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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.

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

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.