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

Etihad Airways, China Eastern, and Qatar Airways 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 Emirates 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 56% of people opting to fly with this airline when travelling to Region of Siem Reap. Keep in mind that there are 6 different airlines that fly to Region of Siem Reap on a routine basis, so you have a few additional options to choose from.

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 18h 20m on average. Another popular route from United Kingdom to Region of Siem Reap is flying from Birmingham to Siem Reap, which will take roughly 22h. Keep in mind that layovers or delays could extend your travel time.

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 May 2026, there are 6 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.

£359 Cheap Flights from the United Kingdom to Siem Reap in 2026

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Find the cheapest flights from the United Kingdom to Siem Reap

Round-trip

One-way

Last minute

Recent return flight deals from the United Kingdom to Siem Reap

Enter your travel dates to find the best prices.

09:30 - 09:00

LHR

SAI

41h 30m

2 stops

19:20 - 18:45

SAI

LHR

29h 25m

2 stops

£573Etihad Airways

Fri, 12 Jun - Fri, 26 Jun

09:30 - 11:15

LHR

SAI

19h 45m

2 stops

19:20 - 18:45

SAI

LHR

29h 25m

2 stops

£586Etihad Airways

Sun, 14 Jun - Tue, 30 Jun

10:30 - 21:00

LGW

SAI

27h 30m

3 stops

22:00 - 06:30

SAI

LGW

39h 30m

3 stops

£613China Eastern

Wed, 4 Nov - Sat, 28 Nov

10:30 - 21:00

LGW

SAI

27h 30m

3 stops

22:00 - 06:30

SAI

LGW

39h 30m

3 stops

£626China Eastern

Fri, 6 Nov - Sat, 28 Nov

09:25 - 18:55

LGW

SAI

27h 30m

2 stops

09:40 - 08:25

SAI

LGW

28h 45m

2 stops

£674SWISS

Thu, 11 Jun - Fri, 19 Jun

09:25 - 18:55

LGW

SAI

27h 30m

2 stops

09:40 - 08:25

SAI

LGW

28h 45m

2 stops

£676SWISS

Sat, 12 Sep - Wed, 23 Sep

14:05 - 21:10

STN

SAI

24h 05m

2 stops

23:50 - 17:55

SAI

STN

25h 05m

2 stops

£730Emirates

Mon, 2 Nov - Tue, 17 Nov

13:35 - 21:10

LGW

SAI

24h 35m

2 stops

23:50 - 18:25

SAI

LGW

25h 35m

2 stops

£735Emirates

Mon, 2 Nov - Tue, 17 Nov

10:15 - 12:40

MAN

SAI

19h 25m

2 stops

13:20 - 06:35

SAI

MAN

24h 15m

2 stops

£830Multiple Airlines

Thu, 5 Nov - Thu, 19 Nov

09:20 - 17:50

MAN

SAI

50h 30m

2 stops

15:10 - 07:45

SAI

MAN

22h 35m

3 stops

£875Multiple Airlines

Fri, 29 May - Fri, 5 Jun

Singapore Airlines flights from United Kingdom to Region of Siem Reap

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

Singapore Airlines

15 Sept

LGW10:05London Gatwick

23h 05m

1 stop

SAI15:10Siem Reap–Angkor Intl

28 Sept

SAI10:30Siem Reap–Angkor Intl

29h 00m

1 stop

LGW09:30London Gatwick

£781

Singapore Airlines

5 Nov

LHR10:40London Heathrow

22h 15m

1 stop

SAI15:55Siem Reap–Angkor Intl

19 Nov

SAI16:45Siem Reap–Angkor Intl

29h 35m

1 stop

LHR15:20London Heathrow

£784

Singapore Airlines

5 Nov

LHR09:10London Heathrow

23h 45m

1 stop

SAI15:55Siem Reap–Angkor Intl

15 Nov

SAI10:45Siem Reap–Angkor Intl

27h 55m

1 stop

LHR07:40London Heathrow

£786

Etihad Airways flights from United Kingdom to Region of Siem Reap

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

Etihad Airways

12 Jun

LHR09:30London Heathrow

41h 30m

2 stops

SAI09:00Siem Reap–Angkor Intl

26 Jun

SAI19:20Siem Reap–Angkor Intl

29h 25m

2 stops

LHR18:45London Heathrow

£573

Etihad Airways

14 Jun

LHR09:30London Heathrow

19h 45m

2 stops

SAI11:15Siem Reap–Angkor Intl

30 Jun

SAI19:20Siem Reap–Angkor Intl

29h 25m

2 stops

LHR18:45London Heathrow

£586

Etihad Airways

1 Jun

LHR21:45London Heathrow

31h 30m

2 stops

SAI11:15Siem Reap–Angkor Intl

7 Jun

SAI13:00Siem Reap–Angkor Intl

35h 45m

2 stops

LHR18:45London Heathrow

£590

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

LHR - SAI

LHRSAI

London Heathrow

Fri 12/6

09:30-09:00

2 stops41h 30m

Siem Reap–Angkor Intl

Fri 26/6

19:20-18:45

2 stops29h 25m

£573

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Sun 14/6

09:30-11:15

2 stops19h 45m

Siem Reap–Angkor Intl

Tue 30/6

19:20-18:45

2 stops29h 25m

£586

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Wed 4/11

10:30-21:00

3 stops27h 30m

Siem Reap–Angkor Intl

Sat 28/11

22:00-06:30

3 stops39h 30m

£613

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Fri 6/11

10:30-21:00

3 stops27h 30m

Siem Reap–Angkor Intl

Sat 28/11

22:00-06:30

3 stops39h 30m

£626

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Thu 11/6

09:25-18:55

2 stops27h 30m

Siem Reap–Angkor Intl

Fri 19/6

09:40-08:25

2 stops28h 45m

£674

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Sat 12/9

09:25-18:55

2 stops27h 30m

Siem Reap–Angkor Intl

Wed 23/9

09:40-08:25

2 stops28h 45m

£676

LondonSiem Reap

STN - SAI

STNSAI

London Stansted

Mon 2/11

14:05-21:10

2 stops24h 05m

Siem Reap–Angkor Intl

Tue 17/11

23:50-17:55

2 stops25h 05m

£730

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Mon 2/11

13:35-21:10

2 stops24h 35m

Siem Reap–Angkor Intl

Tue 17/11

23:50-18:25

2 stops25h 35m

£735

Fastest return journey

ManchesterSiem Reap

MAN - SAI

MANSAI

Manchester

Thu 5/11

10:15-12:40

2 stops19h 25m

Siem Reap–Angkor Intl

Thu 19/11

13:20-06:35

2 stops24h 15m

£830

ManchesterSiem Reap

MAN - SAI

MANSAI

Manchester

Fri 29/5

09:20-17:50

2 stops50h 30m

Siem Reap–Angkor Intl

Fri 5/6

15:10-07:45

3 stops22h 35m

£875

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 May, then March is your next best option. Flight prices from United Kingdom to Region of Siem Reap during March average around £532.

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

You could potentially save up to 13% 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

Fastest flight time	17h 45m
Direct flights	None

The fastest flight from United Kingdom to Region of Siem Reap takes 17h 45m

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 May 2026, there are 6 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 £532	Free Cancellation	Rating 7.6 915 reviews	Search Austrian Airlines flights
Lufthansa	PriceFrom £590	Free Cancellation	Rating 6.8 7,992 reviews	Search Lufthansa flights
Vietnam Airlines	PriceFrom £611	Free Cancellation	Rating 7.7 267 reviews	Search Vietnam Airlines flights
Singapore Airlines	PriceFrom £656	Free Cancellation	Rating 8.2 1,511 reviews	Search Singapore Airlines flights
Emirates	PriceFrom £841	Free Cancellation	Rating 8.1 3,571 reviews	Search Emirates flights
Thai Airways	PriceFrom £851	Free Cancellation	Rating 7.9 401 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 Phnom Penhfrom £646

Flights to Siem Reapfrom £590

Cheap flights from the United Kingdom to Siem Reap from £359

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 2/6. 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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Recent return flight deals from the United Kingdom to Siem Reap

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

Singapore Airlines flights from United Kingdom to Region of Siem Reap

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

Etihad Airways flights from United Kingdom to Region of Siem Reap

Our best Etihad Airways 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

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

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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