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 London according to our data. Singapore Airlines is the first choice among our users, with 41% of people opting to fly with this airline when travelling to Region of Siem Reap. Keep in mind that there are 3 different airlines that fly to Region of Siem Reap on a routine basis, so you have a few additional options to choose from.

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

China Eastern and Austrian Airlines are the most popular carriers operating from London to Siem Reap

When did momondo last update prices for flights from London to Siem Reap?

Prices for flights from London to Siem Reap are updated daily.

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

As of November 2026, there are 3 operators available to choose from for flights from London to Siem Reap.

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

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 London to Siem Reap.

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

The required travel and health documents for your Siem Reap 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 Siem Reap. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

£319 Cheap Flights from London to Siem Reap in 2026/27

Find the cheapest flights from London to Siem Reap

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One-way

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Cheap return flights

Enter your travel dates to find the best prices.

10:30 - 20:05LGW London Gatwick-SAI Siem Reap–Angkor Intl

26h 35m2 stops Shanghai Pu Dong Kunming Changshui

21:05 - 06:30SAI Siem Reap–Angkor Intl-LGW London Gatwick

40h 25m2 stops Kunming Changshui Shanghai Hongqiao Intl

£588China Eastern

Mon, 23 Nov - Tue, 8 Dec

10:30 - 20:05LGW London Gatwick-SAI Siem Reap–Angkor Intl

26h 35m3 stops Shanghai Pu Dong Fuzhou Kunming Changshui

21:05 - 06:30SAI Siem Reap–Angkor Intl-LGW London Gatwick

40h 25m2 stops Kunming Changshui Shanghai Pu Dong

£593China Eastern

Mon, 23 Nov - Tue, 8 Dec

10:30 - 20:05LGW London Gatwick-SAI Siem Reap–Angkor Intl

26h 35m3 stops Shanghai Pu Dong Fuzhou Kunming Changshui

21:05 - 06:30SAI Siem Reap–Angkor Intl-LGW London Gatwick

40h 25m2 stops Kunming Changshui Shanghai Pu Dong

£593China Eastern

Mon, 30 Nov - Tue, 15 Dec

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

16h 15m1 stop Singapore Changi

16:50 - 15:20SAI Siem Reap–Angkor Intl-LHR London Heathrow

29h 30m1 stop Singapore Changi

£756Singapore Airlines

Wed, 17 Feb - Wed, 17 Mar

11:00 - 21:45LHR London Heathrow-SAI Siem Reap–Angkor Intl

27h 45m1 stop Ho Chi Minh City

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

20h 20m1 stop Hanoi Noibai

£771Vietnam Airlines

Thu, 26 Nov - Thu, 10 Dec

11:00 - 21:45LHR London Heathrow-SAI Siem Reap–Angkor Intl

27h 45m1 stop Ho Chi Minh City

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

19h 35m1 stop Ho Chi Minh City

£773Vietnam Airlines

Thu, 3 Dec - Wed, 16 Dec

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

17h 45m1 stop Singapore Changi

16:50 - 15:20SAI Siem Reap–Angkor Intl-LHR London Heathrow

29h 30m1 stop Singapore Changi

£782Singapore Airlines

Wed, 10 Feb - Tue, 16 Feb

10:40 - 16:00LHR London Heathrow-SAI Siem Reap–Angkor Intl

22h 20m1 stop Singapore Changi

16:50 - 15:20SAI Siem Reap–Angkor Intl-LHR London Heathrow

29h 30m1 stop Singapore Changi

£816Singapore Airlines

Sat, 16 Jan - Wed, 17 Feb

11:50 - 08:45LHR London Heathrow-SAI Siem Reap–Angkor Intl

13h 55m1 stop Bangkok Suvarnabhumi

09:50 - 19:35SAI Siem Reap–Angkor Intl-LHR London Heathrow

16h 45m1 stop Bangkok Suvarnabhumi

£1,044Thai Airways

Wed, 13 Jan - Fri, 22 Jan

11:50 - 08:45LHR London Heathrow-SAI Siem Reap–Angkor Intl

13h 55m1 stop Bangkok Suvarnabhumi

09:50 - 19:35SAI Siem Reap–Angkor Intl-LHR London Heathrow

16h 45m1 stop Bangkok Suvarnabhumi

£1,044Thai Airways

Fri, 15 Jan - Sat, 23 Jan

Cheap last-minute flights

Enter your travel dates to find the best prices.

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

40h 05m2 stops Shanghai Pu Dong Kunming Changshui

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

51h 25m2 stops Kunming Changshui Shanghai Pu Dong

£624China Eastern

Tue, 10 Nov - Sat, 5 Dec

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

40h 05m2 stops Shanghai Pu Dong Kunming Changshui

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

51h 25m2 stops Kunming Changshui Shanghai Pu Dong

£627China Eastern

Tue, 10 Nov - Sat, 5 Dec

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

40h 05m2 stops Shanghai Pu Dong Kunming Changshui

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

51h 25m2 stops Kunming Changshui Shanghai Pu Dong

£644China Eastern

Tue, 10 Nov - Sat, 5 Dec

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

19h 55m1 stop Singapore Changi

16:50 - 06:25SAI Siem Reap–Angkor Intl-LGW London Gatwick

20h 35m1 stop Singapore Changi

£821Singapore Airlines

Tue, 10 Nov - Tue, 17 Nov

11:00 - 21:45LHR London Heathrow-SAI Siem Reap–Angkor Intl

27h 45m1 stop Ho Chi Minh City

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

20h 20m1 stop Hanoi Noibai

£837Vietnam Airlines

Tue, 10 Nov - Thu, 3 Dec

11:00 - 21:45LHR London Heathrow-SAI Siem Reap–Angkor Intl

27h 45m1 stop Ho Chi Minh City

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

20h 20m1 stop Hanoi Noibai

£838Vietnam Airlines

Tue, 10 Nov - Thu, 3 Dec

20:35 - 16:00LHR London Heathrow-SAI Siem Reap–Angkor Intl

36h 25m1 stop Singapore Changi

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

35h 35m1 stop Singapore Changi

£848Singapore Airlines

Tue, 10 Nov - Thu, 3 Dec

10:40 - 16:00LHR London Heathrow-SAI Siem Reap–Angkor Intl

22h 20m1 stop Singapore Changi

16:50 - 15:20SAI Siem Reap–Angkor Intl-LHR London Heathrow

29h 30m1 stop Singapore Changi

£851Singapore Airlines

Tue, 10 Nov - Tue, 17 Nov

11:50 - 08:45LHR London Heathrow-SAI Siem Reap–Angkor Intl

13h 55m1 stop Bangkok Suvarnabhumi

09:50 - 19:35SAI Siem Reap–Angkor Intl-LHR London Heathrow

16h 45m1 stop Bangkok Suvarnabhumi

£982Thai Airways

Tue, 10 Nov - Sat, 5 Dec

11:50 - 08:45LHR London Heathrow-SAI Siem Reap–Angkor Intl

13h 55m1 stop Bangkok Suvarnabhumi

09:50 - 19:35SAI Siem Reap–Angkor Intl-LHR London Heathrow

16h 45m1 stop Bangkok Suvarnabhumi

£985Thai Airways

Tue, 10 Nov - Sat, 5 Dec

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Austrian Airlines flights from London to Region of Siem Reap

Our best Austrian Airlines deals on London to Region of Siem Reap flight tickets

Austrian Airlines

23 Nov

LHR06:00London Heathrow

29h 30m

2 stops

SAI18:30Siem Reap–Angkor Intl

8 Dec

SAI09:55Siem Reap–Angkor Intl

18h 45m

2 stops

LHR21:40London Heathrow

£741

Austrian Airlines

23 Nov

LHR06:00London Heathrow

29h 30m

2 stops

SAI18:30Siem Reap–Angkor Intl

8 Dec

SAI09:55Siem Reap–Angkor Intl

18h 45m

2 stops

LHR21:40London Heathrow

£750

Singapore Airlines flights from London to Region of Siem Reap

Our best Singapore Airlines deals on London to Region of Siem Reap flight tickets

Singapore Airlines

17 Feb

LHR10:40London Heathrow

16h 15m

1 stop

SAI09:55Siem Reap–Angkor Intl

17 Mar

SAI16:50Siem Reap–Angkor Intl

29h 30m

1 stop

LHR15:20London Heathrow

£756

Singapore Airlines

10 Nov

LGW13:05London Gatwick

19h 55m

1 stop

SAI16:00Siem Reap–Angkor Intl

17 Nov

SAI16:50Siem Reap–Angkor Intl

20h 35m

1 stop

LGW06:25London Gatwick

£821

Singapore Airlines

10 Nov

LHR20:35London Heathrow

36h 25m

1 stop

SAI16:00Siem Reap–Angkor Intl

3 Dec

SAI10:45Siem Reap–Angkor Intl

35h 35m

1 stop

LHR15:20London Heathrow

£848

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonSiem Reap

LGW London Gatwick - SAI Siem Reap–Angkor Intl

LGWSAI

London Gatwick

Mon 23/11

10:30-20:05

2 stops26h 35m

Siem Reap–Angkor Intl

Tue 8/12

21:05-06:30

2 stops40h 25m

£588

LondonSiem Reap

LGW London Gatwick - SAI Siem Reap–Angkor Intl

LGWSAI

London Gatwick

Mon 23/11

10:30-20:05

3 stops26h 35m

Siem Reap–Angkor Intl

Tue 8/12

21:05-06:30

2 stops40h 25m

£593

LondonSiem Reap

LGW London Gatwick - SAI Siem Reap–Angkor Intl

LGWSAI

London Gatwick

Mon 30/11

10:30-20:05

3 stops26h 35m

Siem Reap–Angkor Intl

Tue 15/12

21:05-06:30

2 stops40h 25m

£593

LondonSiem Reap

LHR London Heathrow - SAI Siem Reap–Angkor Intl

LHRSAI

London Heathrow

Wed 17/2

10:40-09:55

1 stop16h 15m

Siem Reap–Angkor Intl

Wed 17/3

16:50-15:20

1 stop29h 30m

£756

LondonSiem Reap

LHR London Heathrow - SAI Siem Reap–Angkor Intl

LHRSAI

London Heathrow

Thu 26/11

11:00-21:45

1 stop27h 45m

Siem Reap–Angkor Intl

Thu 10/12

17:55-07:15

1 stop20h 20m

£771

LondonSiem Reap

LHR London Heathrow - SAI Siem Reap–Angkor Intl

LHRSAI

London Heathrow

Thu 3/12

11:00-21:45

1 stop27h 45m

Siem Reap–Angkor Intl

Wed 16/12

18:40-07:15

1 stop19h 35m

£773

LondonSiem Reap

LHR London Heathrow - SAI Siem Reap–Angkor Intl

LHRSAI

London Heathrow

Wed 10/2

09:10-09:55

1 stop17h 45m

Siem Reap–Angkor Intl

Tue 16/2

16:50-15:20

1 stop29h 30m

£782

LondonSiem Reap

LHR London Heathrow - SAI Siem Reap–Angkor Intl

LHRSAI

London Heathrow

Sat 16/1

10:40-16:00

1 stop22h 20m

Siem Reap–Angkor Intl

Wed 17/2

16:50-15:20

1 stop29h 30m

£816

Fastest return journey

LondonSiem Reap

LHR London Heathrow - SAI Siem Reap–Angkor Intl

LHRSAI

London Heathrow

Wed 13/1

11:50-08:45

1 stop13h 55m

Siem Reap–Angkor Intl

Fri 22/1

09:50-19:35

1 stop16h 45m

£1,044

LondonSiem Reap

LHR London Heathrow - SAI Siem Reap–Angkor Intl

LHRSAI

London Heathrow

Fri 15/1

11:50-08:45

1 stop13h 55m

Siem Reap–Angkor Intl

Sat 23/1

09:50-19:35

1 stop16h 45m

£1,044

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 London 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

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 September, then January is your next best option. Flight prices from London to Region of Siem Reap during January average around £776.

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

You could potentially save up to 27% on your flight if you consider stops on a London to Region of Siem Reap flight.

Cheap London to Region of Siem Reap flight deals and tips

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

Best price found	£319
Fastest flight time	16h 15m
Direct flights	None

The best one-way flight to Region of Siem Reap from London in the past 72 hours is £319. The best return flight deal from London to Region of Siem Reap found on momondo in the last 72 hours is £588.

The fastest flight from London to Region of Siem Reap takes 16h 15m

There are no direct flights from London to Region of Siem Reap. There are no popular flight routes from London to Region of Siem Reap.

Search flight deals

Frequently asked questions about flying from London to Siem Reap

When did momondo last update prices for flights from London to Siem Reap?
Prices for flights from London to Siem Reap are updated daily.
How many operators does momondo search for flights from London to Siem Reap?
As of November 2026, there are 3 operators available to choose from for flights from London to Siem Reap.
How old do you have to be to fly from London to Siem Reap?
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 London to Siem Reap.
What documentation or ID do you need to fly to Siem Reap?
The required travel and health documents for your Siem Reap 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 Siem Reap. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from London to Region of Siem Reap

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

Airline	Rating	Free Cancellation	Price
Singapore Airlines	PriceFrom £668	Free Cancellation	Rating 8.2 1,632 reviews	Search Singapore Airlines flights
Vietnam Airlines	PriceFrom £747	Free Cancellation	Rating 7.7 296 reviews	Search Vietnam Airlines flights
Thai Airways	PriceFrom £895	Free Cancellation	Rating 7.9 433 reviews	Search Thai Airways flights

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from London to Siem Reap. momondo saves you time and could save you money on your trip.

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

Flights from London to Siem Reap 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.

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

momondo provides multiple filters to help you find the best flight to Siem Reap from London. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Of course. momondo tracks the price of London to Siem Reap flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your Region of Siem Reap trip

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Flights to Siem Reapfrom £576

Cheap flights from London to Siem Reap from £319

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London to Siem Reap departing on 31/1. 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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Austrian Airlines flights from London to Region of Siem Reap

Our best Austrian Airlines deals on London to Region of Siem Reap flight tickets

Singapore Airlines flights from London to Region of Siem Reap

Our best Singapore Airlines deals on London to Region of Siem Reap flight tickets

momondo Fare Finder

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

See travel insights to Siem Reap from

How to get the cheapest flight ticket from London to Region of Siem Reap

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

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

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

Which airlines fly to Region of Siem Reap?

Cheap London to Region of Siem Reap flight deals and tips

Best price found

Fastest flight time

Direct flights

Frequently asked questions about flying from London to Siem Reap

Best airlines flying from London to Region of Siem Reap

Compare and see reviews for airlines that fly from London 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

London 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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According to popular flight searches on momondo this year