What is the cheapest airline that flies from United Kingdom to Siem Reap–Angkor Intl?

Etihad Airways, SWISS, and Qatar Airways are the most popular carriers operating from United Kingdom to Siem Reap–Angkor Intl

How long does it take to fly to Siem Reap?

If you’re flying from a popular airport in United Kingdom, such as London or Birmingham, and flying into Siem Reap, then you can expect flight times to average 16h 50m and 18h, respectively.

Which airlines fly to Siem Reap?

Singapore Airlines, Vietnam Airlines and Thai Airways are the top three most popular airlines that fly to Siem Reap from United Kingdom according to our data. Singapore Airlines is the first choice among our users, with 56% of people opting to fly with this airline when travelling to Siem Reap. Keep in mind that there are 5 different airlines that fly to Siem Reap on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from United Kingdom to Siem Reap–Angkor Intl Airport?

Prices for flights from United Kingdom to Siem Reap–Angkor Intl Airport refresh daily.

How many operators does momondo search for flights from United Kingdom to Siem Reap–Angkor Intl Airport?

There are 5 operators available for flights from United Kingdom to Siem Reap–Angkor Intl Airport as of September 2026.

How old do you have to be to fly from United Kingdom to Siem Reap–Angkor Intl Airport?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from United Kingdom to Siem Reap–Angkor Intl Airport.

What documentation or ID do you need to fly to Siem Reap–Angkor Intl Airport?

The necessary travel and health documents for your Siem Reap–Angkor Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

£337 Cheap Flights from the United Kingdom to Siem Reap in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from the United Kingdom to Siem Reap

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Recent return flight deals from the United Kingdom to Siem Reap

Enter your travel dates to find the best prices.

10:30 - 21:00LGW London Gatwick-SAI Siem Reap–Angkor Intl

27h 30m3 stops Shanghai Pu Dong Fuzhou Kunming Changshui

22:00 - 14:00SAI Siem Reap–Angkor Intl-LGW London Gatwick

47h 00m2 stops Kunming Changshui Shanghai Pu Dong

£593China Eastern

Fri, 6 Nov - Sat, 14 Nov

10:30 - 21:00LGW London Gatwick-SAI Siem Reap–Angkor Intl

27h 30m2 stops Shanghai Pu Dong Kunming Changshui

22:00 - 14:00SAI Siem Reap–Angkor Intl-LGW London Gatwick

47h 00m2 stops Kunming Changshui Shanghai Pu Dong

£595China Eastern

Fri, 6 Nov - Sat, 14 Nov

09:05 - 18:45LHR London Heathrow-SAI Siem Reap–Angkor Intl

26h 40m2 stops Vienna Intl Bangkok Suvarnabhumi

09:55 - 21:40SAI Siem Reap–Angkor Intl-LHR London Heathrow

18h 45m2 stops Bangkok Suvarnabhumi Vienna Intl

£636Austrian Airlines

Sun, 17 Jan - Sun, 24 Jan

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

16h 20m2 stops Vienna Intl Bangkok Suvarnabhumi

09:55 - 21:40SAI Siem Reap–Angkor Intl-LHR London Heathrow

18h 45m2 stops Bangkok Suvarnabhumi Vienna Intl

£638Austrian Airlines

Sat, 23 Jan - Sat, 6 Feb

08:15 - 12:05MAN Manchester-SAI Siem Reap–Angkor Intl

44h 50m2 stops Abu Dhabi Zayed Intl Phnom Penh Techo Intl

19:30 - 06:15SAI Siem Reap–Angkor Intl-MAN Manchester

41h 45m2 stops Phnom Penh Techo Intl Abu Dhabi Zayed Intl

£717Etihad Airways

Wed, 4 Nov - Wed, 11 Nov

18:55 - 17:10LHR London Heathrow-SAI Siem Reap–Angkor Intl

16h 15m1 stop Hanoi Noibai

22:35 - 16:55SAI Siem Reap–Angkor Intl-LHR London Heathrow

24h 20m1 stop Ho Chi Minh City

£718Vietnam Airlines

Wed, 30 Sep - Wed, 21 Oct

18:55 - 18:20LHR London Heathrow-SAI Siem Reap–Angkor Intl

17h 25m1 stop Ho Chi Minh City

22:35 - 16:55SAI Siem Reap–Angkor Intl-LHR London Heathrow

24h 20m1 stop Ho Chi Minh City

£718Vietnam Airlines

Thu, 1 Oct - Wed, 14 Oct

08:15 - 12:05MAN Manchester-SAI Siem Reap–Angkor Intl

44h 50m2 stops Abu Dhabi Zayed Intl Phnom Penh Techo Intl

19:30 - 06:15SAI Siem Reap–Angkor Intl-MAN Manchester

41h 45m2 stops Phnom Penh Techo Intl Abu Dhabi Zayed Intl

£719Etihad Airways

Wed, 4 Nov - Wed, 11 Nov

13:05 - 16:00LGW London Gatwick-SAI Siem Reap–Angkor Intl

19h 55m1 stop Singapore Changi

10:45 - 09:05SAI Siem Reap–Angkor Intl-LGW London Gatwick

29h 20m1 stop Singapore Changi

£734Singapore Airlines

Thu, 14 Jan - Sun, 14 Feb

21:45 - 16:00LHR London Heathrow-SAI Siem Reap–Angkor Intl

35h 15m1 stop Singapore Changi

10:45 - 19:10SAI Siem Reap–Angkor Intl-LHR London Heathrow

39h 25m1 stop Singapore Changi

£760Singapore Airlines

Sat, 7 Nov - Sat, 23 Jan

Recent last minute flight deals from the United Kingdom to Siem Reap

Enter your travel dates to find the best prices.

11:15 - 18:05LGW London Gatwick-SAI Siem Reap–Angkor Intl

24h 50m2 stops Shanghai Pu Dong Hanoi Noibai

19:05 - 07:00SAI Siem Reap–Angkor Intl-LGW London Gatwick

41h 55m2 stops Hanoi Noibai Shanghai Pu Dong

£492Multiple Airlines

Mon, 21 Sep - Tue, 29 Sep

11:15 - 17:10LGW London Gatwick-SAI Siem Reap–Angkor Intl

23h 55m2 stops Shanghai Pu Dong Hanoi Noibai

19:10 - 07:00SAI Siem Reap–Angkor Intl-LGW London Gatwick

41h 50m3 stops Ho Chi Minh City Hanoi Noibai Shanghai Pu Dong

£594Multiple Airlines

Mon, 21 Sep - Tue, 29 Sep

11:15 - 18:05LGW London Gatwick-SAI Siem Reap–Angkor Intl

24h 50m2 stops Shanghai Pu Dong Hanoi Noibai

19:35 - 06:55SAI Siem Reap–Angkor Intl-LGW London Gatwick

41h 20m2 stops Bangkok Suvarnabhumi Manama Bahrain Intl

£660Multiple Airlines

Mon, 21 Sep - Fri, 25 Sep

06:55 - 17:10LGW London Gatwick-SAI Siem Reap–Angkor Intl

28h 15m3 stops Milan Malpensa Shanghai Pu Dong Hanoi Noibai

19:35 - 06:55SAI Siem Reap–Angkor Intl-LGW London Gatwick

41h 20m2 stops Bangkok Suvarnabhumi Manama Bahrain Intl

£674Multiple Airlines

Mon, 21 Sep - Fri, 25 Sep

07:15 - 17:10LTN London Luton-SAI Siem Reap–Angkor Intl

27h 55m3 stops Milan Malpensa Shanghai Pu Dong Hanoi Noibai

23:50 - 22:10SAI Siem Reap–Angkor Intl-LTN London Luton

28h 20m3 stops Bangkok Suvarnabhumi Abu Dhabi Zayed Intl Dublin

£676Multiple Airlines

Mon, 21 Sep - Tue, 29 Sep

18:55 - 17:10LHR London Heathrow-SAI Siem Reap–Angkor Intl

16h 15m1 stop Hanoi Noibai

22:35 - 16:55SAI Siem Reap–Angkor Intl-LHR London Heathrow

24h 20m1 stop Ho Chi Minh City

£718Vietnam Airlines

Wed, 23 Sep - Wed, 21 Oct

18:55 - 18:20LHR London Heathrow-SAI Siem Reap–Angkor Intl

17h 25m1 stop Ho Chi Minh City

22:35 - 16:55SAI Siem Reap–Angkor Intl-LHR London Heathrow

24h 20m1 stop Ho Chi Minh City

£722Vietnam Airlines

Thu, 24 Sep - Wed, 7 Oct

18:55 - 17:10LHR London Heathrow-SAI Siem Reap–Angkor Intl

16h 15m1 stop Hanoi Noibai

22:35 - 16:55SAI Siem Reap–Angkor Intl-LHR London Heathrow

24h 20m1 stop Ho Chi Minh City

£722Vietnam Airlines

Wed, 23 Sep - Wed, 21 Oct

12:20 - 15:10LGW London Gatwick-SAI Siem Reap–Angkor Intl

20h 50m1 stop Singapore Changi

10:30 - 09:40SAI Siem Reap–Angkor Intl-LGW London Gatwick

29h 10m1 stop Singapore Changi

£731Singapore Airlines

Thu, 24 Sep - Wed, 7 Oct

10:00 - 09:40LGW London Gatwick-SAI Siem Reap–Angkor Intl

17h 40m1 stop Singapore Changi

10:30 - 09:40SAI Siem Reap–Angkor Intl-LGW London Gatwick

29h 10m1 stop Singapore Changi

£1,024Singapore Airlines

Wed, 23 Sep - Wed, 21 Oct

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China Eastern flights from United Kingdom to Siem Reap

Our best China Eastern deals on United Kingdom to Siem Reap flight tickets

China Eastern

6 Nov

LGW10:30London Gatwick

27h 30m

3 stops

SAI21:00Siem Reap–Angkor Intl

14 Nov

SAI22:00Siem Reap–Angkor Intl

47h 00m

2 stops

LGW14:00London Gatwick

£593

China Eastern

6 Nov

LGW10:30London Gatwick

27h 30m

2 stops

SAI21:00Siem Reap–Angkor Intl

14 Nov

SAI22:00Siem Reap–Angkor Intl

47h 00m

2 stops

LGW14:00London Gatwick

£595

China Eastern

6 Nov

LGW10:30London Gatwick

27h 30m

3 stops

SAI21:00Siem Reap–Angkor Intl

14 Nov

SAI22:00Siem Reap–Angkor Intl

47h 00m

3 stops

LGW14:00London Gatwick

£599

Lufthansa flights from United Kingdom to Siem Reap

Our best Lufthansa deals on United Kingdom to Siem Reap flight tickets

Lufthansa

23 Feb

BHX17:45Birmingham

18h 00m

2 stops

SAI18:45Siem Reap–Angkor Intl

11 Mar

SAI16:50Siem Reap–Angkor Intl

26h 40m

2 stops

BHX12:30Birmingham

£686

Lufthansa

23 Feb

BHX17:45Birmingham

18h 00m

2 stops

SAI18:45Siem Reap–Angkor Intl

11 Mar

SAI16:50Siem Reap–Angkor Intl

26h 40m

2 stops

BHX12:30Birmingham

£688

Lufthansa

23 Feb

BHX17:45Birmingham

18h 00m

2 stops

SAI18:45Siem Reap–Angkor Intl

11 Mar

SAI16:50Siem Reap–Angkor Intl

26h 40m

2 stops

BHX12:30Birmingham

£689

momondo Fare Finder

Use the filters below to find and compare flights from the United Kingdom to Siem Reap that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonSiem Reap

LGW London Gatwick - SAI Siem Reap–Angkor Intl

LGWSAI

London Gatwick

Fri 6/11

10:30-21:00

3 stops27h 30m

Siem Reap–Angkor Intl

Sat 14/11

22:00-14:00

2 stops47h 00m

£593

LondonSiem Reap

LGW London Gatwick - SAI Siem Reap–Angkor Intl

LGWSAI

London Gatwick

Fri 6/11

10:30-21:00

2 stops27h 30m

Siem Reap–Angkor Intl

Sat 14/11

22:00-14:00

2 stops47h 00m

£595

LondonSiem Reap

LHR London Heathrow - SAI Siem Reap–Angkor Intl

LHRSAI

London Heathrow

Sun 17/1

09:05-18:45

2 stops26h 40m

Siem Reap–Angkor Intl

Sun 24/1

09:55-21:40

2 stops18h 45m

£636

Fastest return journey

LondonSiem Reap

LHR London Heathrow - SAI Siem Reap–Angkor Intl

LHRSAI

London Heathrow

Sat 23/1

19:25-18:45

2 stops16h 20m

Siem Reap–Angkor Intl

Sat 6/2

09:55-21:40

2 stops18h 45m

£638

ManchesterSiem Reap

MAN Manchester - SAI Siem Reap–Angkor Intl

MANSAI

Manchester

Wed 4/11

08:15-12:05

2 stops44h 50m

Siem Reap–Angkor Intl

Wed 11/11

19:30-06:15

2 stops41h 45m

£717

LondonSiem Reap

LHR London Heathrow - SAI Siem Reap–Angkor Intl

LHRSAI

London Heathrow

Wed 30/9

18:55-17:10

1 stop16h 15m

Siem Reap–Angkor Intl

Wed 21/10

22:35-16:55

1 stop24h 20m

£718

LondonSiem Reap

LHR London Heathrow - SAI Siem Reap–Angkor Intl

LHRSAI

London Heathrow

Thu 1/10

18:55-18:20

1 stop17h 25m

Siem Reap–Angkor Intl

Wed 14/10

22:35-16:55

1 stop24h 20m

£718

ManchesterSiem Reap

MAN Manchester - SAI Siem Reap–Angkor Intl

MANSAI

Manchester

Wed 4/11

08:15-12:05

2 stops44h 50m

Siem Reap–Angkor Intl

Wed 11/11

19:30-06:15

2 stops41h 45m

£719

LondonSiem Reap

LGW London Gatwick - SAI Siem Reap–Angkor Intl

LGWSAI

London Gatwick

Thu 14/1

13:05-16:00

1 stop19h 55m

Siem Reap–Angkor Intl

Sun 14/2

10:45-09:05

1 stop29h 20m

£734

LondonSiem Reap

LHR London Heathrow - SAI Siem Reap–Angkor Intl

LHRSAI

London Heathrow

Sat 7/11

21:45-16:00

1 stop35h 15m

Siem Reap–Angkor Intl

Sat 23/1

10:45-19:10

1 stop39h 25m

£760

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 United Kingdom to Siem Reap

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

Other information

What is the cheapest month to fly to Siem Reap?

The month of June is, on average, the cheapest month to fly to Siem Reap from United Kingdom, with most prices found around £660. If you don’t want to visit Siem Reap in June, then you should wait until September to fly from United Kingdom, when ticket prices are also cheap, with an average price of £762.

Can stopping save me money on United Kingdom to Siem Reap flights?

You could potentially save up to 3% on your flight if you consider stops on a United Kingdom to Siem Reap flight.

Cheap United Kingdom to Siem Reap flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from United Kingdom to Siem Reap

Best price found	£337
Fastest flight time	14h 25m
Direct flights	None

The best one-way flight to Siem Reap from United Kingdom in the past 72 hours is £337. The best return flight deal from United Kingdom to Siem Reap found on momondo in the last 72 hours is £593.

The fastest flight from United Kingdom to Siem Reap takes 14h 25m

There are no direct flights from United Kingdom to Siem Reap. There are no popular flight routes from United Kingdom to Siem Reap.

Search flight deals

Frequently asked questions about flying from the United Kingdom to Siem Reap

When did momondo last update prices for flights from United Kingdom to Siem Reap–Angkor Intl Airport?
Prices for flights from United Kingdom to Siem Reap–Angkor Intl Airport refresh daily.
How many operators does momondo search for flights from United Kingdom to Siem Reap–Angkor Intl Airport?
There are 5 operators available for flights from United Kingdom to Siem Reap–Angkor Intl Airport as of September 2026.
How old do you have to be to fly from United Kingdom to Siem Reap–Angkor Intl Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from United Kingdom to Siem Reap–Angkor Intl Airport.
What documentation or ID do you need to fly to Siem Reap–Angkor Intl Airport?
The necessary travel and health documents for your Siem Reap–Angkor Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from United Kingdom to Siem Reap

Compare and see reviews for airlines that fly from United Kingdom to Siem Reap with momondo

Airline	Rating	Free Cancellation	Price
Austrian Airlines	PriceFrom £542	Free Cancellation	Rating 7.6 964 reviews	Search Austrian Airlines flights
Etihad Airways	PriceFrom £550	Free Cancellation	Rating 7.3 1,535 reviews	Search Etihad Airways flights
Vietnam Airlines	PriceFrom £620	Free Cancellation	Rating 7.7 288 reviews	Search Vietnam Airlines flights
Singapore Airlines	PriceFrom £667	Free Cancellation	Rating 8.2 1,606 reviews	Search Singapore Airlines flights
Thai Airways	PriceFrom £913	Free Cancellation	Rating 7.9 420 reviews	Search Thai Airways flights

Why use momondo?

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

It is quick and easy to find United Kingdom to Siem Reap flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Siem Reap that suits you.

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

Yes. All flights to Siem Reap from United Kingdom on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

momondo helps you find the best flight between United Kingdom and Siem Reap by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

If you are not ready to book a flight from United Kingdom to Siem Reap now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Siem Reap and let you know when they change.

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Cheap flights from the United Kingdom to Siem Reap from £337

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from the United Kingdom to Siem Reap departing on 21/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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China Eastern flights from United Kingdom to Siem Reap

Our best China Eastern deals on United Kingdom to Siem Reap flight tickets

Lufthansa flights from United Kingdom to Siem Reap

Our best Lufthansa deals on United Kingdom to Siem Reap flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from the United Kingdom to Siem Reap that are best for you.

See travel insights to Siem Reap from

How to get the cheapest flight ticket from United Kingdom to Siem Reap

What is the cheapest month to fly to Siem Reap?

Can stopping save me money on United Kingdom to Siem Reap flights?

What is the cheapest airline that flies from United Kingdom to Siem Reap–Angkor Intl?

Which airlines fly to Siem Reap?

How long does it take to fly to Siem Reap?

Cheap United Kingdom to Siem Reap flight deals and tips

Best price found

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Direct flights

Frequently asked questions about flying from the United Kingdom to Siem Reap

Best airlines flying from United Kingdom to Siem Reap

Compare and see reviews for airlines that fly from United Kingdom to Siem Reap with momondo

Why use momondo?

An easier way to manage your Siem Reap trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Cambodia

Fly your favourite airline to Siem Reap

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Siem Reap

List of cabin classes available on flights landing in Siem Reap. Availability may vary depending on flight origin and airline.

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Popular flights according to clicks in the last 7 days on momondo

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According to popular flight searches on momondo this year

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