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 53% 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.

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

SWISS, China Eastern, and Emirates 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 March 2026, there are 5 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.

£345 Cheap Flights from London to Siem Reap in 2026

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Find the cheapest flights from London to Siem Reap

Round-trip

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

16:15 - 18:45

LHR

SAI

20h 30m

2 stops

19:30 - 07:30

SAI

LHR

42h 00m

2 stops

£577Multiple Airlines

Wed, 20 May - Wed, 27 May

16:15 - 18:45

LHR

SAI

20h 30m

2 stops

09:45 - 07:30

SAI

LHR

27h 45m

2 stops

£582Multiple Airlines

Mon, 18 May - Sun, 24 May

20:45 - 11:10

LHR

SAI

32h 25m

3 stops

19:05 - 18:45

SAI

LHR

29h 40m

2 stops

£643Multiple Airlines

Mon, 18 May - Sun, 24 May

21:45 - 21:30

LGW

SAI

41h 45m

2 stops

23:50 - 19:45

SAI

LGW

25h 55m

2 stops

£742Emirates

Thu, 23 Apr - Tue, 5 May

14:35 - 21:30

LGW

SAI

24h 55m

2 stops

23:50 - 19:45

SAI

LGW

25h 55m

2 stops

£744Emirates

Fri, 24 Apr - Tue, 5 May

21:05 - 21:30

STN

SAI

18h 25m

2 stops

13:05 - 12:55

SAI

STN

29h 50m

2 stops

£745Emirates

Mon, 27 Apr - Mon, 18 May

21:45 - 12:20

LGW

SAI

32h 35m

2 stops

13:05 - 19:45

SAI

LGW

36h 40m

2 stops

£749Emirates

Mon, 27 Apr - Mon, 18 May

09:15 - 18:45

LCY

SAI

27h 30m

2 stops

09:45 - 08:40

SAI

LCY

28h 55m

2 stops

£976SWISS

Wed, 20 May - Wed, 27 May

13:10 - 18:45

LCY

SAI

23h 35m

2 stops

10:30 - 08:40

SAI

LCY

28h 10m

2 stops

£1,085SWISS

Fri, 15 May - Mon, 1 Jun

13:10 - 18:45

LCY

SAI

23h 35m

2 stops

09:45 - 07:25

SAI

LCY

27h 40m

2 stops

£1,098SWISS

Fri, 15 May - Sun, 31 May

Emirates flights from London to Region of Siem Reap

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

Emirates

23 Apr

LGW21:45London Gatwick

41h 45m

2 stops

SAI21:30Siem Reap–Angkor Intl

5 May

SAI23:50Siem Reap–Angkor Intl

25h 55m

2 stops

LGW19:45London Gatwick

£742

Emirates

24 Apr

LGW14:35London Gatwick

24h 55m

2 stops

SAI21:30Siem Reap–Angkor Intl

5 May

SAI23:50Siem Reap–Angkor Intl

25h 55m

2 stops

LGW19:45London Gatwick

£744

Emirates

27 Apr

STN21:05London Stansted

18h 25m

2 stops

SAI21:30Siem Reap–Angkor Intl

18 May

SAI13:05Siem Reap–Angkor Intl

29h 50m

2 stops

STN12:55London Stansted

£745

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 Aug

LGW13:10London Gatwick

38h 30m

1 stop

SAI09:40Siem Reap–Angkor Intl

23 Aug

SAI16:00Siem Reap–Angkor Intl

24h 10m

1 stop

LGW10:10London Gatwick

£775

Singapore Airlines

11 Apr

LGW13:00London Gatwick

20h 10m

1 stop

SAI15:10Siem Reap–Angkor Intl

15 May

SAI10:30Siem Reap–Angkor Intl

29h 00m

1 stop

LGW09:30London Gatwick

£970

Singapore Airlines

11 Apr

LGW13:00London Gatwick

20h 10m

1 stop

SAI15:10Siem Reap–Angkor Intl

4 May

SAI10:30Siem Reap–Angkor Intl

29h 00m

1 stop

LGW09:30London Gatwick

£1,205

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Wed 20/5

16:15-18:45

2 stops20h 30m

Siem Reap–Angkor Intl

Wed 27/5

19:30-07:30

2 stops42h 00m

£577

Fastest return journey

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Mon 18/5

16:15-18:45

2 stops20h 30m

Siem Reap–Angkor Intl

Sun 24/5

09:45-07:30

2 stops27h 45m

£582

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Mon 18/5

20:45-11:10

3 stops32h 25m

Siem Reap–Angkor Intl

Sun 24/5

19:05-18:45

2 stops29h 40m

£643

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Thu 23/4

21:45-21:30

2 stops41h 45m

Siem Reap–Angkor Intl

Tue 5/5

23:50-19:45

2 stops25h 55m

£742

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Fri 24/4

14:35-21:30

2 stops24h 55m

Siem Reap–Angkor Intl

Tue 5/5

23:50-19:45

2 stops25h 55m

£744

LondonSiem Reap

STN - SAI

STNSAI

London Stansted

Mon 27/4

21:05-21:30

2 stops18h 25m

Siem Reap–Angkor Intl

Mon 18/5

13:05-12:55

2 stops29h 50m

£745

LondonSiem Reap

LGW - SAI

LGWSAI

London Gatwick

Mon 27/4

21:45-12:20

2 stops32h 35m

Siem Reap–Angkor Intl

Mon 18/5

13:05-19:45

2 stops36h 40m

£749

LondonSiem Reap

LCY - SAI

LCYSAI

London City

Wed 20/5

09:15-18:45

2 stops27h 30m

Siem Reap–Angkor Intl

Wed 27/5

09:45-08:40

2 stops28h 55m

£976

LondonSiem Reap

LCY - SAI

LCYSAI

London City

Fri 15/5

13:10-18:45

2 stops23h 35m

Siem Reap–Angkor Intl

Mon 1/6

10:30-08:40

2 stops28h 10m

£1,085

LondonSiem Reap

LCY - SAI

LCYSAI

London City

Fri 15/5

13:10-18:45

2 stops23h 35m

Siem Reap–Angkor Intl

Sun 31/5

09:45-07:25

2 stops27h 40m

£1,098

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 £754.

How far in advance should I book a flight to Region of Siem Reap?

You are more likely to see cheaper flights to Region of Siem Reap from London when booking weeks ahead of your departure date. In general, you can expect to find flights to Region of Siem Reap for around £811 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Region of Siem Reap from London for as low as £671 on momondo.

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

You could potentially save up to 4% 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

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 March 2026, there are 5 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 £546	Free Cancellation	Rating 7.6 903 reviews	Search Austrian Airlines flights
Lufthansa	PriceFrom £606	Free Cancellation	Rating 6.8 7,877 reviews	Search Lufthansa flights
Vietnam Airlines	PriceFrom £625	Free Cancellation	Rating 7.7 250 reviews	Search Vietnam Airlines flights
Singapore Airlines	PriceFrom £673	Free Cancellation	Rating 8.2 1,484 reviews	Search Singapore Airlines flights
Thai Airways	PriceFrom £870	Free Cancellation	Rating 7.8 395 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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Feeling lucky

Popular Cities in Siem Reap

Flights to Phnom Penhfrom £663

Flights to Siem Reapfrom £582

Cheap flights from London to Siem Reap from £345

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 15/9. 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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Big names, great deals

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Filter for what you want

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Emirates flights from London to Region of Siem Reap

Our best Emirates 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

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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?

How far in advance should I book a flight 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

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

Fastest flight time

Direct flights

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

Explore popular destinations other users love

According to popular flight searches on momondo this year