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.

£230 Cheap Flights from 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.

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

31h 30m2 stops Bangkok Suvarnabhumi Dubai Intl

19:00 - 21:10LHR London Heathrow-SAI Siem Reap–Angkor Intl

19h 10m2 stops Dubai Intl Bangkok Suvarnabhumi

£711Emirates

Wed, 9 Dec - Fri, 22 Jan

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

17h 45m1 stop Hanoi Noibai

21:10 - 15:35LHR London Heathrow-SAI Siem Reap–Angkor Intl

35h 25m2 stops Shenzhen Phnom Penh Techo Intl

£734Multiple Airlines

Sat, 31 Oct - Sun, 8 Nov

13:20 - 14:45SAI Siem Reap–Angkor Intl-LHR London Heathrow

32h 25m2 stops Bangkok Suvarnabhumi Manama Bahrain Intl

19:25 - 18:45LHR London Heathrow-SAI Siem Reap–Angkor Intl

16h 20m2 stops Vienna Intl Bangkok Suvarnabhumi

£755Multiple Airlines

Thu, 10 Dec - Fri, 22 Jan

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

17h 45m1 stop Hanoi Noibai

21:00 - 16:05LHR London Heathrow-SAI Siem Reap–Angkor Intl

36h 05m2 stops Shanghai Pu Dong Phuket City

£774Multiple Airlines

Thu, 10 Dec - Fri, 22 Jan

19:25 - 20:40SAI Siem Reap–Angkor Intl-LHR London Heathrow

32h 15m2 stops Bangkok Suvarnabhumi Helsinki-Vantaa

10:20 - 12:40LHR London Heathrow-SAI Siem Reap–Angkor Intl

19h 20m2 stops Helsinki-Vantaa Bangkok Suvarnabhumi

£787Finnair

Sat, 31 Oct - Sun, 8 Nov

21:30 - 07:15SAI Siem Reap–Angkor Intl-LHR London Heathrow

16h 45m1 stop Ho Chi Minh City

21:00 - 11:00LHR London Heathrow-SAI Siem Reap–Angkor Intl

31h 00m2 stops Shanghai Pu Dong Bangkok Suvarnabhumi

£809Multiple Airlines

Wed, 9 Dec - Fri, 22 Jan

18:40 - 07:15SAI Siem Reap–Angkor Intl-LHR London Heathrow

19h 35m1 stop Ho Chi Minh City

11:00 - 19:40LHR London Heathrow-SAI Siem Reap–Angkor Intl

25h 40m1 stop Hanoi Noibai

£865Vietnam Airlines

Wed, 9 Dec - Fri, 22 Jan

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

17h 45m1 stop Hanoi Noibai

11:50 - 09:15LHR London Heathrow-SAI Siem Reap–Angkor Intl

14h 25m1 stop Bangkok Suvarnabhumi

£900Multiple Airlines

Thu, 10 Dec - Fri, 22 Jan

21:30 - 07:15SAI Siem Reap–Angkor Intl-LHR London Heathrow

16h 45m1 stop Ho Chi Minh City

10:40 - 09:55LHR London Heathrow-SAI Siem Reap–Angkor Intl

16h 15m1 stop Singapore Changi

£952Multiple Airlines

Wed, 9 Dec - Fri, 22 Jan

17:55 - 07:15SAI Siem Reap–Angkor Intl-LHR London Heathrow

20h 20m1 stop Hanoi Noibai

21:20 - 18:30LHR London Heathrow-SAI Siem Reap–Angkor Intl

14h 10m1 stop Bangkok Suvarnabhumi

£956Multiple Airlines

Sat, 31 Oct - Sun, 8 Nov

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

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Fly to

Route

Depart

Return

Price

Cheapest return flight

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LHR London Heathrow

SAILHR

Siem Reap–Angkor Intl

Wed 9/12

13:20-13:50

2 stops31h 30m

London Heathrow

Fri 22/1

19:00-21:10

2 stops19h 10m

£711

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LHR London Heathrow

SAILHR

Siem Reap–Angkor Intl

Sat 31/10

20:30-07:15

1 stop17h 45m

London Heathrow

Sun 8/11

21:10-15:35

2 stops35h 25m

£734

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LHR London Heathrow

SAILHR

Siem Reap–Angkor Intl

Thu 10/12

13:20-14:45

2 stops32h 25m

London Heathrow

Fri 22/1

19:25-18:45

2 stops16h 20m

£755

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LHR London Heathrow

SAILHR

Siem Reap–Angkor Intl

Thu 10/12

20:30-07:15

1 stop17h 45m

London Heathrow

Fri 22/1

21:00-16:05

2 stops36h 05m

£774

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LHR London Heathrow

SAILHR

Siem Reap–Angkor Intl

Sat 31/10

19:25-20:40

2 stops32h 15m

London Heathrow

Sun 8/11

10:20-12:40

2 stops19h 20m

£787

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LHR London Heathrow

SAILHR

Siem Reap–Angkor Intl

Wed 9/12

21:30-07:15

1 stop16h 45m

London Heathrow

Fri 22/1

21:00-11:00

2 stops31h 00m

£809

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LHR London Heathrow

SAILHR

Siem Reap–Angkor Intl

Wed 9/12

18:40-07:15

1 stop19h 35m

London Heathrow

Fri 22/1

11:00-19:40

1 stop25h 40m

£865

Fastest return journey

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LHR London Heathrow

SAILHR

Siem Reap–Angkor Intl

Thu 10/12

20:30-07:15

1 stop17h 45m

London Heathrow

Fri 22/1

11:50-09:15

1 stop14h 25m

£900

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LHR London Heathrow

SAILHR

Siem Reap–Angkor Intl

Wed 9/12

21:30-07:15

1 stop16h 45m

London Heathrow

Fri 22/1

10:40-09:55

1 stop16h 15m

£952

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LHR London Heathrow

SAILHR

Siem Reap–Angkor Intl

Sat 31/10

17:55-07:15

1 stop20h 20m

London Heathrow

Sun 8/11

21:20-18:30

1 stop14h 10m

£956

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

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

You could potentially save up to 21% 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

Best price found	£230
Fastest flight time	17h 45m
Direct flights	None

The best one-way flight to London Heathrow Airport from Siem Reap in the past 72 hours is £230. The best return flight deal from Siem Reap to London Heathrow Airport found on momondo in the last 72 hours is £711.

The fastest flight from Siem Reap to London Heathrow Airport takes 17h 45m

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

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 17h 45m.
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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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.

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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.