How long is the flight from United Kingdom to Region of Siem Reap?

Flight times from United Kingdom to Region of Siem Reap vary, but if you’re flying out of London and flying into Siem Reap (one of the most popular routes), then the duration is 15h 20m on average. Another popular route from United Kingdom to Region of Siem Reap is flying from Manchester to Siem Reap, which will take roughly 26h 55m. Keep in mind that layovers or delays could extend your travel time.

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

Lufthansa, SWISS, and Vietnam Airlines are the most popular carriers operating from United Kingdom to Siem Reap

Which airlines fly to Region of Siem Reap?

Singapore Airlines, Vietnam Airlines and Thai Airways are the top three most popular airlines that fly to Region of Siem Reap from United Kingdom according to our data. Singapore Airlines is the first choice among our users, with 57% of people opting to fly with this airline when travelling to Region of Siem Reap. Keep in mind that there are 5 different airlines that fly to Region of 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?

Prices for flights from United Kingdom to Siem Reap were last updated today.

How many operators does momondo search for flights from United Kingdom to Siem Reap?

As of August 2026, there are 5 operators available to choose from for flights from United Kingdom to Siem Reap.

How old do you have to be to fly from United Kingdom to Siem Reap?

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 United Kingdom to Siem Reap.

What documentation or ID do you need to fly to Siem Reap?

The travel and health documents required for your trip to Siem Reap 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 Siem Reap. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

£312 Cheap Flights from the United Kingdom to Siem Reap in 2026

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.

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

£529Multiple Airlines

Thu, 10 Sep - Thu, 8 Oct

11:35 - 18:05LGW London Gatwick-SAI Siem Reap–Angkor Intl

23h 30m2 stops Beijing Capital Hanoi Noibai

19:05 - 06:55SAI Siem Reap–Angkor Intl-LGW London Gatwick

42h 50m2 stops Hanoi Noibai Shanghai Pu Dong

£561Multiple Airlines

Mon, 16 Nov - Mon, 30 Nov

06:00 - 18:45LHR London Heathrow-SAI Siem Reap–Angkor Intl

29h 45m2 stops Vienna Intl Bangkok Suvarnabhumi

09:55 - 14:05SAI Siem Reap–Angkor Intl-LHR London Heathrow

35h 10m2 stops Bangkok Suvarnabhumi Vienna Intl

£612Austrian Airlines

Thu, 3 Dec - Mon, 14 Dec

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

16h 15m1 stop Hanoi Noibai

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

17h 45m1 stop Hanoi Noibai

£626Vietnam Airlines

Mon, 28 Sep - Thu, 28 Jan

19:50 - 18:20LHR London Heathrow-SAI Siem Reap–Angkor Intl

16h 30m1 stop Ho Chi Minh City

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

17h 45m1 stop Hanoi Noibai

£626Vietnam Airlines

Tue, 29 Sep - Thu, 28 Jan

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

40h 20m2 stops Vienna Intl Bangkok Suvarnabhumi

09:55 - 08:20SAI Siem Reap–Angkor Intl-LHR London Heathrow

29h 25m2 stops Bangkok Suvarnabhumi Vienna Intl

£640Austrian Airlines

Tue, 10 Nov - Sat, 5 Dec

09:20 - 16:00LGW London Gatwick-SAI Siem Reap–Angkor Intl

23h 40m1 stop Singapore Changi

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

29h 20m1 stop Singapore Changi

£756Singapore Airlines

Mon, 16 Nov - Mon, 30 Nov

20:45 - 12:15MAN Manchester-SAI Siem Reap–Angkor Intl

33h 30m2 stops Abu Dhabi Zayed Intl Bangkok Suvarnabhumi

15:10 - 18:50SAI Siem Reap–Angkor Intl-MAN Manchester

33h 40m2 stops Phnom Penh Techo Intl Abu Dhabi Zayed Intl

£761Etihad Airways

Sun, 13 Sep - Thu, 24 Sep

09:20 - 12:15MAN Manchester-SAI Siem Reap–Angkor Intl

44h 55m2 stops Abu Dhabi Zayed Intl Bangkok Suvarnabhumi

12:40 - 06:55SAI Siem Reap–Angkor Intl-MAN Manchester

24h 15m2 stops Phnom Penh Techo Intl Abu Dhabi Zayed Intl

£761Etihad Airways

Sun, 13 Sep - Tue, 22 Sep

20:35 - 09:55LHR London Heathrow-SAI Siem Reap–Angkor Intl

30h 20m1 stop Singapore Changi

10:45 - 15:20SAI Siem Reap–Angkor Intl-LHR London Heathrow

35h 35m1 stop Singapore Changi

£763Singapore Airlines

Thu, 14 Jan - Mon, 1 Feb

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

12:55 - 06:55SAI Siem Reap–Angkor Intl-LGW London Gatwick

24h 00m2 stops Bangkok Suvarnabhumi Manama Bahrain Intl

£653Multiple Airlines

Thu, 3 Sep - Thu, 24 Sep

07:30 - 18:05LGW London Gatwick-SAI Siem Reap–Angkor Intl

28h 35m3 stops Barcelona-El Prat Beijing Capital Hanoi Noibai

11:55 - 06:55SAI Siem Reap–Angkor Intl-LGW London Gatwick

25h 00m2 stops Bangkok Don Mueang Intl Manama Bahrain Intl

£723Multiple Airlines

Thu, 3 Sep - Thu, 24 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

£745Vietnam Airlines

Wed, 2 Sep - Wed, 30 Sep

06:00 - 18:55LHR London Heathrow-SAI Siem Reap–Angkor Intl

30h 55m2 stops Vienna Intl Bangkok Suvarnabhumi

09:40 - 07:55SAI Siem Reap–Angkor Intl-LHR London Heathrow

28h 15m2 stops Bangkok Suvarnabhumi Zurich

£745Multiple Airlines

Thu, 3 Sep - Thu, 24 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

£771Vietnam Airlines

Wed, 2 Sep - Wed, 23 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

£773Vietnam Airlines

Wed, 2 Sep - Wed, 30 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

£773Vietnam Airlines

Wed, 2 Sep - Wed, 23 Sep

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

17h 25m1 stop Ho Chi Minh City

12:55 - 06:55SAI Siem Reap–Angkor Intl-LHR London Heathrow

24h 00m2 stops Bangkok Suvarnabhumi Manama Bahrain Intl

£782Multiple Airlines

Thu, 3 Sep - Thu, 24 Sep

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

17h 40m1 stop Singapore Changi

16:00 - 09:40SAI Siem Reap–Angkor Intl-LGW London Gatwick

23h 40m1 stop Singapore Changi

£1,184Singapore Airlines

Wed, 2 Sep - Wed, 23 Sep

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

17h 40m1 stop Singapore Changi

16:00 - 09:40SAI Siem Reap–Angkor Intl-LGW London Gatwick

23h 40m1 stop Singapore Changi

£1,222Singapore Airlines

Wed, 2 Sep - Wed, 23 Sep

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Vietnam Airlines flights from United Kingdom to Region of Siem Reap

Our best Vietnam Airlines deals on United Kingdom to Region of Siem Reap flight tickets

Vietnam Airlines

28 Sept

LHR18:55London Heathrow

16h 15m

1 stop

SAI17:10Siem Reap–Angkor Intl

25 Jan

SAI21:30Siem Reap–Angkor Intl

16h 45m

1 stop

LHR07:15London Heathrow

£626

Vietnam Airlines

27 Sept

LHR19:50London Heathrow

15h 20m

1 stop

SAI17:10Siem Reap–Angkor Intl

27 Jan

SAI18:40Siem Reap–Angkor Intl

19h 35m

1 stop

LHR07:15London Heathrow

£638

Vietnam Airlines

28 Sept

LHR18:55London Heathrow

16h 15m

1 stop

SAI17:10Siem Reap–Angkor Intl

22 Jan

SAI21:30Siem Reap–Angkor Intl

16h 45m

1 stop

LHR07:15London Heathrow

£685

SWISS flights from United Kingdom to Region of Siem Reap

Our best SWISS deals on United Kingdom to Region of Siem Reap flight tickets

SWISS

16 Nov

LGW18:40London Gatwick

32h 15m

2 stops

SAI09:55Siem Reap–Angkor Intl

30 Nov

SAI16:50Siem Reap–Angkor Intl

22h 00m

2 stops

LGW07:50London Gatwick

£666

SWISS

10 Sept

LHR08:45London Heathrow

28h 00m

2 stops

SAI18:45Siem Reap–Angkor Intl

8 Oct

SAI09:40Siem Reap–Angkor Intl

28h 15m

2 stops

LHR07:55London Heathrow

£669

SWISS

17 Nov

LHR12:05London Heathrow

23h 40m

2 stops

SAI18:45Siem Reap–Angkor Intl

30 Nov

SAI16:50Siem Reap–Angkor Intl

22h 15m

2 stops

LHR08:05London Heathrow

£705

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

Thu 10/9

11:15-18:05

2 stops24h 50m

Siem Reap–Angkor Intl

Thu 8/10

19:05-07:00

2 stops41h 55m

£529

LondonSiem Reap

LGW London Gatwick - SAI Siem Reap–Angkor Intl

LGWSAI

London Gatwick

Mon 16/11

11:35-18:05

2 stops23h 30m

Siem Reap–Angkor Intl

Mon 30/11

19:05-06:55

2 stops42h 50m

£561

LondonSiem Reap

LHR London Heathrow - SAI Siem Reap–Angkor Intl

LHRSAI

London Heathrow

Thu 3/12

06:00-18:45

2 stops29h 45m

Siem Reap–Angkor Intl

Mon 14/12

09:55-14:05

2 stops35h 10m

£612

Fastest return journey

LondonSiem Reap

LHR London Heathrow - SAI Siem Reap–Angkor Intl

LHRSAI

London Heathrow

Mon 28/9

18:55-17:10

1 stop16h 15m

Siem Reap–Angkor Intl

Thu 28/1

20:30-07:15

1 stop17h 45m

£626

LondonSiem Reap

LHR London Heathrow - SAI Siem Reap–Angkor Intl

LHRSAI

London Heathrow

Tue 29/9

19:50-18:20

1 stop16h 30m

Siem Reap–Angkor Intl

Thu 28/1

20:30-07:15

1 stop17h 45m

£626

LondonSiem Reap

LHR London Heathrow - SAI Siem Reap–Angkor Intl

LHRSAI

London Heathrow

Tue 10/11

19:25-18:45

2 stops40h 20m

Siem Reap–Angkor Intl

Sat 5/12

09:55-08:20

2 stops29h 25m

£640

LondonSiem Reap

LGW London Gatwick - SAI Siem Reap–Angkor Intl

LGWSAI

London Gatwick

Mon 16/11

09:20-16:00

1 stop23h 40m

Siem Reap–Angkor Intl

Mon 30/11

10:45-09:05

1 stop29h 20m

£756

ManchesterSiem Reap

MAN Manchester - SAI Siem Reap–Angkor Intl

MANSAI

Manchester

Sun 13/9

20:45-12:15

2 stops33h 30m

Siem Reap–Angkor Intl

Thu 24/9

15:10-18:50

2 stops33h 40m

£761

ManchesterSiem Reap

MAN Manchester - SAI Siem Reap–Angkor Intl

MANSAI

Manchester

Sun 13/9

09:20-12:15

2 stops44h 55m

Siem Reap–Angkor Intl

Tue 22/9

12:40-06:55

2 stops24h 15m

£761

LondonSiem Reap

LHR London Heathrow - SAI Siem Reap–Angkor Intl

LHRSAI

London Heathrow

Thu 14/1

20:35-09:55

1 stop30h 20m

Siem Reap–Angkor Intl

Mon 1/2

10:45-15:20

1 stop35h 35m

£763

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 Region of 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 Region of Siem Reap?

If you’re not able to fly to Region of Siem Reap in June, then September is your next best option. Flight prices from United Kingdom to Region of Siem Reap during September average around £753.

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

You could potentially save up to 14% on your flight if you consider stops on a United Kingdom to Region of Siem Reap flight.

Cheap United Kingdom to Region of Siem Reap flight deals and tips

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

Best price found	£312
Fastest flight time	14h 25m
Direct flights	None

The best one-way flight to Region of Siem Reap from United Kingdom in the past 72 hours is £312. The best return flight deal from United Kingdom to Region of Siem Reap found on momondo in the last 72 hours is £529.

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

There are no direct flights from United Kingdom to Region of Siem Reap. There are no popular flight routes from United Kingdom to Region of 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?
Prices for flights from United Kingdom to Siem Reap were last updated today.
How many operators does momondo search for flights from United Kingdom to Siem Reap?
As of August 2026, there are 5 operators available to choose from for flights from United Kingdom to Siem Reap.
How old do you have to be to fly from United Kingdom to Siem Reap?
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 United Kingdom to Siem Reap.
What documentation or ID do you need to fly to Siem Reap?
The travel and health documents required for your trip to Siem Reap 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 Siem Reap. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from United Kingdom to Region of Siem Reap

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

Airline	Rating	Free Cancellation	Price
Austrian Airlines	PriceFrom £535	Free Cancellation	Rating 7.6 948 reviews	Search Austrian Airlines flights
Etihad Airways	PriceFrom £543	Free Cancellation	Rating 7.3 1,529 reviews	Search Etihad Airways flights
Vietnam Airlines	PriceFrom £612	Free Cancellation	Rating 7.7 286 reviews	Search Vietnam Airlines flights
Singapore Airlines	PriceFrom £659	Free Cancellation	Rating 8.2 1,591 reviews	Search Singapore Airlines flights
Thai Airways	PriceFrom £883	Free Cancellation	Rating 7.9 418 reviews	Search Thai Airways flights

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Siem Reap from United Kingdom.

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?

Yes. momondo can track prices for United Kingdom to Siem Reap flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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Flights to Siem Reapfrom £561

Cheap flights from the United Kingdom to Siem Reap from £312

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 5/9. 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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Vietnam Airlines flights from United Kingdom to Region of Siem Reap

Our best Vietnam Airlines deals on United Kingdom to Region of Siem Reap flight tickets

SWISS flights from United Kingdom to Region of Siem Reap

Our best SWISS deals on United Kingdom to Region of 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 Region of Siem Reap

What is the cheapest month to fly to Region of Siem Reap?

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

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

Which airlines fly to Region of Siem Reap?

How long is the flight from United Kingdom to Region of Siem Reap?

Cheap United Kingdom to Region of Siem Reap flight deals and tips

Best price found

Fastest flight time

Direct flights

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

Best airlines flying from United Kingdom to Region of Siem Reap

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

Why use momondo?

An easier way to manage your Region of 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 Siem Reap

Popular Cities in Siem Reap

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

United Kingdom flight routes

According to popular flight searches on momondo this year

Region of Siem Reap flight routes

According to popular flight searches on momondo this year

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.

Complete your trip to Siem Reap

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