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

Emirates is the most popular carrier 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.

£373 Cheap Flights from Region of 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

Round-trip

One-way

Cheap return flights

Enter your travel dates to find the best prices.

19:35 - 15:05

SAI

LHR

25h 30m

2 stops

20:45 - 09:00

LHR

SAI

30h 15m

2 stops

£840Etihad Airways

Sat, 11 Jul - Sat, 1 Aug

23:50 - 18:40

SAI

LHR

24h 50m

2 stops

19:50 - 12:15

LHR

SAI

58h 25m

2 stops

£883Emirates

Sat, 11 Jul - Sat, 1 Aug

15:10 - 07:30

SAI

LHR

22h 20m

3 stops

16:00 - 18:55

LHR

SAI

20h 55m

2 stops

£1,065Multiple Airlines

Sat, 11 Jul - Sat, 1 Aug

09:40 - 21:45

SAI

LHR

18h 05m

2 stops

19:15 - 18:55

LHR

SAI

41h 40m

3 stops

£1,101Multiple Airlines

Sat, 11 Jul - Sat, 1 Aug

23:50 - 19:20

SAI

LHR

25h 30m

1 stop

21:35 - 18:55

LHR

SAI

15h 20m

1 stop

£1,360Multiple Airlines

Sat, 11 Jul - Sat, 1 Aug

23:50 - 19:20

SAI

LHR

25h 30m

1 stop

21:35 - 18:55

LHR

SAI

15h 20m

1 stop

£1,360Multiple Airlines

Sat, 11 Jul - Sat, 1 Aug

16:55 - 07:15

SAI

LHR

20h 20m

1 stop

06:40 - 09:00

LHR

SAI

20h 20m

2 stops

£1,392Multiple Airlines

Sat, 11 Jul - Sat, 1 Aug

23:50 - 19:20

SAI

LHR

25h 30m

1 stop

06:40 - 09:00

LHR

SAI

20h 20m

2 stops

£1,415Multiple Airlines

Sat, 11 Jul - Sat, 1 Aug

10:30 - 08:00

SAI

LHR

27h 30m

1 stop

09:25 - 15:10

LHR

SAI

23h 45m

1 stop

£1,785Singapore Airlines

Sat, 11 Jul - Sat, 1 Aug

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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.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Sat 11/7

19:35-15:05

2 stops25h 30m

London Heathrow

Sat 1/8

20:45-09:00

2 stops30h 15m

£840

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Sat 11/7

23:50-18:40

2 stops24h 50m

London Heathrow

Sat 1/8

19:50-12:15

2 stops58h 25m

£883

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Sat 11/7

15:10-07:30

3 stops22h 20m

London Heathrow

Sat 1/8

16:00-18:55

2 stops20h 55m

£1,065

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Sat 11/7

09:40-21:45

2 stops18h 05m

London Heathrow

Sat 1/8

19:15-18:55

3 stops41h 40m

£1,101

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Sat 11/7

23:50-19:20

1 stop25h 30m

London Heathrow

Sat 1/8

21:35-18:55

1 stop15h 20m

£1,360

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Sat 11/7

23:50-19:20

1 stop25h 30m

London Heathrow

Sat 1/8

21:35-18:55

1 stop15h 20m

£1,360

Fastest return journey

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Sat 11/7

16:55-07:15

1 stop20h 20m

London Heathrow

Sat 1/8

06:40-09:00

2 stops20h 20m

£1,392

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Sat 11/7

23:50-19:20

1 stop25h 30m

London Heathrow

Sat 1/8

06:40-09:00

2 stops20h 20m

£1,415

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Sat 11/7

10:30-08:00

1 stop27h 30m

London Heathrow

Sat 1/8

09:25-15:10

1 stop23h 45m

£1,785

Cheapest one-way

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Wed 15/7

19:05-18:40

2 stops29h 35m

£332

Flights are sorted by cheapest return flights first.

Showing 1-10 of 19 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 40% 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	25h 30m
Direct flights	None

The fastest flight from Region of Siem Reap to London Heathrow Airport takes 25h 30m

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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Guildford

Poole

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Why use momondo?

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.

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.