Which airlines fly to Region of Siem Reap?

Singapore Airlines, Vietnam Airlines and Austrian Airlines 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 44% of people opting to fly with this airline when travelling to Region of Siem Reap. Keep in mind that there are 4 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?

Austrian Airlines and SWISS 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 August 2026, there are 4 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.

£275 Cheap Flights from London to Siem Reap in 2026

Discover deals from 900+ travel sites with momondo.

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.

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

29h 45m2 stops Vienna Intl Bangkok Suvarnabhumi

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

29h 25m2 stops Bangkok Suvarnabhumi Vienna Intl

£577Austrian Airlines

Thu, 3 Dec - Mon, 14 Dec

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

27h 30m3 stops Shanghai Pu Dong Fuzhou Kunming Changshui

22:00 - 06:30SAI Siem Reap–Angkor Intl-LGW London Gatwick

39h 30m2 stops Kunming Changshui Shanghai Pu Dong

£588China Eastern

Fri, 30 Oct - Sat, 14 Nov

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

27h 30m3 stops Shanghai Pu Dong Fuzhou Kunming Changshui

22:00 - 06:30SAI Siem Reap–Angkor Intl-LGW London Gatwick

39h 30m3 stops Kunming Changshui Fuzhou Shanghai Pu Dong

£588China Eastern

Fri, 30 Oct - 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

£637Austrian Airlines

Wed, 6 Jan - Mon, 1 Feb

11:00 - 20:30LHR London Heathrow-SAI Siem Reap–Angkor Intl

26h 30m1 stop Ho Chi Minh City

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

16h 45m1 stop Ho Chi Minh City

£757Vietnam Airlines

Thu, 3 Dec - Mon, 14 Dec

19:50 - 17:10LHR London Heathrow-SAI Siem Reap–Angkor Intl

15h 20m1 stop Hanoi Noibai

19:10 - 16:55SAI Siem Reap–Angkor Intl-LHR London Heathrow

27h 45m1 stop Ho Chi Minh City

£785Vietnam Airlines

Sun, 30 Aug - Wed, 30 Sep

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

22h 20m1 stop Singapore Changi

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

35h 35m1 stop Singapore Changi

£789Singapore Airlines

Mon, 11 Jan - Tue, 26 Jan

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

20h 00m1 stop Singapore Changi

10:45 - 09:00SAI Siem Reap–Angkor Intl-LGW London Gatwick

29h 15m1 stop Singapore Changi

£807Singapore Airlines

Thu, 12 Nov - Tue, 24 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

£950Thai Airways

Sat, 7 Nov - Sat, 21 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

£963Thai Airways

Sat, 7 Nov - Sat, 21 Nov

Cheap last-minute flights

Enter your travel dates to find the best prices.

18:00 - 20:10LGW London Gatwick-SAI Siem Reap–Angkor Intl

44h 10m2 stops Shanghai Pu Dong Kunming Changshui

21:10 - 19:10SAI Siem Reap–Angkor Intl-LGW London Gatwick

28h 00m2 stops Kunming Changshui Shanghai Pu Dong

£801China Eastern

Wed, 12 Aug - Wed, 19 Aug

18:00 - 20:10LGW London Gatwick-SAI Siem Reap–Angkor Intl

44h 10m2 stops Shanghai Pu Dong Kunming Changshui

21:10 - 15:00SAI Siem Reap–Angkor Intl-LGW London Gatwick

47h 50m2 stops Kunming Changshui Shanghai Hongqiao Intl

£897China Eastern

Wed, 12 Aug - Fri, 21 Aug

21:20 - 20:10LHR London Heathrow-SAI Siem Reap–Angkor Intl

40h 50m2 stops Shanghai Pu Dong Kunming Changshui

21:10 - 18:40SAI Siem Reap–Angkor Intl-LHR London Heathrow

51h 30m2 stops Kunming Changshui Shanghai Pu Dong

£942China Eastern

Wed, 12 Aug - Fri, 21 Aug

21:20 - 20:10LHR London Heathrow-SAI Siem Reap–Angkor Intl

40h 50m2 stops Shanghai Pu Dong Kunming Changshui

21:10 - 18:40SAI Siem Reap–Angkor Intl-LHR London Heathrow

27h 30m2 stops Kunming Changshui Shanghai Pu Dong

£942China Eastern

Wed, 12 Aug - Wed, 19 Aug

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

17h 25m1 stop Ho Chi Minh City

18:05 - 17:05SAI Siem Reap–Angkor Intl-LHR London Heathrow

29h 00m1 stop Hanoi Noibai

£1,198Vietnam Airlines

Thu, 13 Aug - Sun, 23 Aug

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

17h 25m1 stop Ho Chi Minh City

19:10 - 17:50SAI Siem Reap–Angkor Intl-LHR London Heathrow

52h 40m2 stops Ho Chi Minh City Hanoi Noibai

£1,221Vietnam Airlines

Thu, 13 Aug - Fri, 21 Aug

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

17h 25m1 stop Ho Chi Minh City

19:10 - 17:05SAI Siem Reap–Angkor Intl-LHR London Heathrow

27h 55m2 stops Ho Chi Minh City Hanoi Noibai

£1,221Vietnam Airlines

Thu, 13 Aug - Sun, 23 Aug

13:00 - 09:40LGW London Gatwick-SAI Siem Reap–Angkor Intl

38h 40m1 stop Singapore Changi

10:30 - 06:55SAI Siem Reap–Angkor Intl-LGW London Gatwick

26h 25m1 stop Singapore Changi

£1,249Singapore Airlines

Wed, 12 Aug - Wed, 19 Aug

11:20 - 09:40LHR London Heathrow-SAI Siem Reap–Angkor Intl

16h 20m1 stop Singapore Changi

16:00 - 15:45SAI Siem Reap–Angkor Intl-LHR London Heathrow

29h 45m1 stop Singapore Changi

£1,514Singapore Airlines

Wed, 12 Aug - Fri, 21 Aug

11:20 - 09:40LHR London Heathrow-SAI Siem Reap–Angkor Intl

16h 20m1 stop Singapore Changi

16:00 - 15:45SAI Siem Reap–Angkor Intl-LHR London Heathrow

29h 45m1 stop Singapore Changi

£1,514Singapore Airlines

Thu, 13 Aug - Fri, 21 Aug

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China Eastern flights from London to Region of Siem Reap

Our best China Eastern deals on London to Region of Siem Reap flight tickets

China Eastern

30 Oct

LGW10:30London Gatwick

27h 30m

3 stops

SAI21:00Siem Reap–Angkor Intl

14 Nov

SAI22:00Siem Reap–Angkor Intl

39h 30m

2 stops

LGW06:30London Gatwick

£588

China Eastern

30 Oct

LGW10:30London Gatwick

27h 30m

2 stops

SAI21:00Siem Reap–Angkor Intl

14 Nov

SAI22:00Siem Reap–Angkor Intl

39h 30m

2 stops

LGW06:30London Gatwick

£594

China Eastern

12 Nov

LHR21:00London Heathrow

41h 00m

2 stops

SAI21:00Siem Reap–Angkor Intl

24 Nov

SAI22:00Siem Reap–Angkor Intl

50h 30m

2 stops

LHR17:30London Heathrow

£646

Emirates flights from London to Region of Siem Reap

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

Emirates

7 Oct

STN21:05London Stansted

18h 25m

2 stops

SAI21:30Siem Reap–Angkor Intl

30 Mar

SAI23:50Siem Reap–Angkor Intl

43h 05m

2 stops

STN12:55London Stansted

£747

Emirates

6 Oct

LGW23:55London Gatwick

39h 35m

2 stops

SAI21:30Siem Reap–Angkor Intl

17 Dec

SAI23:50Siem Reap–Angkor Intl

28h 00m

2 stops

LGW20:50London Gatwick

£752

Emirates

7 Oct

LGW14:35London Gatwick

24h 55m

2 stops

SAI21:30Siem Reap–Angkor Intl

30 Mar

SAI23:50Siem Reap–Angkor Intl

25h 55m

2 stops

LGW19:45London Gatwick

£753

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

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

09:55-08:20

2 stops29h 25m

£577

LondonSiem Reap

LGW London Gatwick - SAI Siem Reap–Angkor Intl

LGWSAI

London Gatwick

Fri 30/10

10:30-21:00

3 stops27h 30m

Siem Reap–Angkor Intl

Sat 14/11

22:00-06:30

2 stops39h 30m

£588

LondonSiem Reap

LGW London Gatwick - SAI Siem Reap–Angkor Intl

LGWSAI

London Gatwick

Fri 30/10

10:30-21:00

3 stops27h 30m

Siem Reap–Angkor Intl

Sat 14/11

22:00-06:30

3 stops39h 30m

£588

LondonSiem Reap

LHR London Heathrow - SAI Siem Reap–Angkor Intl

LHRSAI

London Heathrow

Wed 6/1

09:05-18:45

2 stops26h 40m

Siem Reap–Angkor Intl

Mon 1/2

09:55-21:40

2 stops18h 45m

£637

LondonSiem Reap

LHR London Heathrow - SAI Siem Reap–Angkor Intl

LHRSAI

London Heathrow

Thu 3/12

11:00-20:30

1 stop26h 30m

Siem Reap–Angkor Intl

Mon 14/12

21:30-07:15

1 stop16h 45m

£757

LondonSiem Reap

LHR London Heathrow - SAI Siem Reap–Angkor Intl

LHRSAI

London Heathrow

Sun 30/8

19:50-17:10

1 stop15h 20m

Siem Reap–Angkor Intl

Wed 30/9

19:10-16:55

1 stop27h 45m

£785

LondonSiem Reap

LHR London Heathrow - SAI Siem Reap–Angkor Intl

LHRSAI

London Heathrow

Mon 11/1

10:40-16:00

1 stop22h 20m

Siem Reap–Angkor Intl

Tue 26/1

10:45-15:20

1 stop35h 35m

£789

LondonSiem Reap

LGW London Gatwick - SAI Siem Reap–Angkor Intl

LGWSAI

London Gatwick

Thu 12/11

13:00-16:00

1 stop20h 00m

Siem Reap–Angkor Intl

Tue 24/11

10:45-09:00

1 stop29h 15m

£807

Fastest return journey

LondonSiem Reap

LHR London Heathrow - SAI Siem Reap–Angkor Intl

LHRSAI

London Heathrow

Sat 7/11

11:50-08:45

1 stop13h 55m

Siem Reap–Angkor Intl

Sat 21/11

09:50-19:35

1 stop16h 45m

£950

LondonSiem Reap

LHR London Heathrow - SAI Siem Reap–Angkor Intl

LHRSAI

London Heathrow

Sat 7/11

11:50-08:45

1 stop13h 55m

Siem Reap–Angkor Intl

Sat 21/11

09:50-19:35

1 stop16h 45m

£963

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 October is your next best option. Flight prices from London to Region of Siem Reap during October average around £703.

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

You could potentially save up to 8% 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

Fastest flight time	16h 20m
Direct flights	None

The fastest flight from London to Region of Siem Reap takes 16h 20m

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 August 2026, there are 4 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
Austrian Airlines	PriceFrom £552	Free Cancellation	Rating 7.6 950 reviews	Search Austrian Airlines flights
Vietnam Airlines	PriceFrom £615	Free Cancellation	Rating 7.7 283 reviews	Search Vietnam Airlines flights
Singapore Airlines	PriceFrom £662	Free Cancellation	Rating 8.2 1,583 reviews	Search Singapore Airlines flights
Thai Airways	PriceFrom £887	Free Cancellation	Rating 7.9 413 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 £613

Cheap flights from London to Siem Reap from £275

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 1/10. 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 London to Region of Siem Reap

Our best China Eastern deals on London to Region of Siem Reap flight tickets

Emirates flights from London to Region of Siem Reap

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

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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

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