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

Vietnam Airlines and Emirates are the most popular carriers operating from Siem Reap to London

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

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

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

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 Siem Reap to London.

What documentation or ID do you need to fly to London?

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

£251 Cheap Flights from Siem Reap to London in 2026

Find the cheapest flights from Siem Reap to London

Return

One-way

Cheap return flights

Enter your travel dates to find the best prices.

19:20 - 18:45SAI Siem Reap–Angkor Intl-LHR London Heathrow

29h 25m2 stops Phnom Penh Techo Intl Abu Dhabi Zayed Intl

19:20 - 10:55LHR London Heathrow-SAI Siem Reap–Angkor Intl

32h 35m2 stops Abu Dhabi Zayed Intl Phnom Penh Techo Intl

£1,995Etihad Airways

Tue, 20 Oct - Thu, 7 Jan

19:35 - 20:40SAI Siem Reap–Angkor Intl-LHR London Heathrow

31h 05m2 stops Bangkok Suvarnabhumi Helsinki-Vantaa

16:15 - 09:15LHR London Heathrow-SAI Siem Reap–Angkor Intl

34h 00m2 stops Helsinki-Vantaa Bangkok Suvarnabhumi

£2,011Finnair

Mon, 19 Oct - Mon, 11 Jan

15:10 - 12:45SAI Siem Reap–Angkor Intl-LHR London Heathrow

27h 35m2 stops Phnom Penh Techo Intl Abu Dhabi Zayed Intl

20:55 - 10:55LHR London Heathrow-SAI Siem Reap–Angkor Intl

31h 00m2 stops Abu Dhabi Zayed Intl Phnom Penh Techo Intl

£2,032Etihad Airways

Thu, 15 Oct - Mon, 11 Jan

15:10 - 12:45SAI Siem Reap–Angkor Intl-LHR London Heathrow

27h 35m2 stops Phnom Penh Techo Intl Abu Dhabi Zayed Intl

19:20 - 10:55LHR London Heathrow-SAI Siem Reap–Angkor Intl

32h 35m2 stops Abu Dhabi Zayed Intl Phnom Penh Techo Intl

£2,072Etihad Airways

Thu, 15 Oct - Tue, 5 Jan

19:35 - 20:40SAI Siem Reap–Angkor Intl-LHR London Heathrow

31h 05m2 stops Bangkok Suvarnabhumi Helsinki-Vantaa

07:30 - 09:15LHR London Heathrow-SAI Siem Reap–Angkor Intl

18h 45m2 stops Helsinki-Vantaa Bangkok Suvarnabhumi

£2,248Finnair

Mon, 19 Oct - Sat, 9 Jan

19:35 - 15:10SAI Siem Reap–Angkor Intl-LHR London Heathrow

49h 35m2 stops Bangkok Suvarnabhumi Helsinki-Vantaa

07:30 - 09:15LHR London Heathrow-SAI Siem Reap–Angkor Intl

18h 45m2 stops Helsinki-Vantaa Bangkok Suvarnabhumi

£2,251Finnair

Wed, 21 Oct - Sat, 9 Jan

12:55 - 08:00SAI Siem Reap–Angkor Intl-LHR London Heathrow

25h 05m2 stops Bangkok Suvarnabhumi Doha Hamad Intl

09:25 - 12:40LHR London Heathrow-SAI Siem Reap–Angkor Intl

20h 15m2 stops Doha Hamad Intl Bangkok Suvarnabhumi

£2,542Qatar Airways

Sun, 18 Oct - Fri, 8 Jan

19:35 - 15:10SAI Siem Reap–Angkor Intl-LHR London Heathrow

49h 35m2 stops Bangkok Suvarnabhumi Helsinki-Vantaa

16:15 - 12:40LHR London Heathrow-SAI Siem Reap–Angkor Intl

37h 25m2 stops Helsinki-Vantaa Bangkok Suvarnabhumi

£2,584Finnair

Sun, 18 Oct - Mon, 11 Jan

12:55 - 08:00SAI Siem Reap–Angkor Intl-LHR London Heathrow

25h 05m2 stops Bangkok Suvarnabhumi Doha Hamad Intl

08:35 - 18:45LHR London Heathrow-SAI Siem Reap–Angkor Intl

27h 10m2 stops Doha Hamad Intl Bangkok Suvarnabhumi

£2,646Qatar Airways

Sun, 18 Oct - Sun, 10 Jan

12:55 - 14:05SAI Siem Reap–Angkor Intl-LHR London Heathrow

31h 10m2 stops Bangkok Suvarnabhumi Doha Hamad Intl

20:10 - 18:45LHR London Heathrow-SAI Siem Reap–Angkor Intl

39h 35m2 stops Doha Hamad Intl Bangkok Suvarnabhumi

£2,648Qatar Airways

Sun, 18 Oct - Sat, 9 Jan

Save money when you book flights with momondo

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Etihad Airways flights from Region of Siem Reap to London

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

Etihad Airways

20 Oct

SAI19:20Siem Reap–Angkor Intl

29h 25m

2 stops

LHR18:45London Heathrow

7 Jan

LHR19:20London Heathrow

32h 35m

2 stops

SAI10:55Siem Reap–Angkor Intl

£1,995

Etihad Airways

15 Oct

SAI15:10Siem Reap–Angkor Intl

27h 35m

2 stops

LHR12:45London Heathrow

11 Jan

LHR20:55London Heathrow

31h 00m

2 stops

SAI10:55Siem Reap–Angkor Intl

£2,032

Etihad Airways

15 Oct

SAI15:10Siem Reap–Angkor Intl

27h 35m

2 stops

LHR12:45London Heathrow

5 Jan

LHR19:20London Heathrow

32h 35m

2 stops

SAI10:55Siem Reap–Angkor Intl

£2,072

Finnair flights from Region of Siem Reap to London

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

Finnair

19 Oct

SAI19:35Siem Reap–Angkor Intl

31h 05m

2 stops

LHR20:40London Heathrow

11 Jan

LHR16:15London Heathrow

34h 00m

2 stops

SAI09:15Siem Reap–Angkor Intl

£2,011

Finnair

19 Oct

SAI19:35Siem Reap–Angkor Intl

31h 05m

2 stops

LHR20:40London Heathrow

9 Jan

LHR07:30London Heathrow

18h 45m

2 stops

SAI09:15Siem Reap–Angkor Intl

£2,248

Finnair

21 Oct

SAI19:35Siem Reap–Angkor Intl

49h 35m

2 stops

LHR15:10London Heathrow

9 Jan

LHR07:30London Heathrow

18h 45m

2 stops

SAI09:15Siem Reap–Angkor Intl

£2,251

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LHR London Heathrow

SAILHR

Siem Reap–Angkor Intl

Tue 20/10

19:20-18:45

2 stops29h 25m

London Heathrow

Thu 7/1

19:20-10:55

2 stops32h 35m

£1,995

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LHR London Heathrow

SAILHR

Siem Reap–Angkor Intl

Mon 19/10

19:35-20:40

2 stops31h 05m

London Heathrow

Mon 11/1

16:15-09:15

2 stops34h 00m

£2,011

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LHR London Heathrow

SAILHR

Siem Reap–Angkor Intl

Thu 15/10

15:10-12:45

2 stops27h 35m

London Heathrow

Mon 11/1

20:55-10:55

2 stops31h 00m

£2,032

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LHR London Heathrow

SAILHR

Siem Reap–Angkor Intl

Thu 15/10

15:10-12:45

2 stops27h 35m

London Heathrow

Tue 5/1

19:20-10:55

2 stops32h 35m

£2,072

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LHR London Heathrow

SAILHR

Siem Reap–Angkor Intl

Mon 19/10

19:35-20:40

2 stops31h 05m

London Heathrow

Sat 9/1

07:30-09:15

2 stops18h 45m

£2,248

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LHR London Heathrow

SAILHR

Siem Reap–Angkor Intl

Wed 21/10

19:35-15:10

2 stops49h 35m

London Heathrow

Sat 9/1

07:30-09:15

2 stops18h 45m

£2,251

Fastest return journey

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LHR London Heathrow

SAILHR

Siem Reap–Angkor Intl

Sun 18/10

12:55-08:00

2 stops25h 05m

London Heathrow

Fri 8/1

09:25-12:40

2 stops20h 15m

£2,542

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LHR London Heathrow

SAILHR

Siem Reap–Angkor Intl

Sun 18/10

19:35-15:10

2 stops49h 35m

London Heathrow

Mon 11/1

16:15-12:40

2 stops37h 25m

£2,584

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LHR London Heathrow

SAILHR

Siem Reap–Angkor Intl

Sun 18/10

12:55-08:00

2 stops25h 05m

London Heathrow

Sun 10/1

08:35-18:45

2 stops27h 10m

£2,646

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LHR London Heathrow

SAILHR

Siem Reap–Angkor Intl

Sun 18/10

12:55-14:05

2 stops31h 10m

London Heathrow

Sat 9/1

20:10-18:45

2 stops39h 35m

£2,648

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 Region of Siem Reap to London

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

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

You could potentially save up to 25% on your flight if you consider stops on a Region of Siem Reap to London flight.

Cheap Region of Siem Reap to London flight deals and tips

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

Best price found	£251
Fastest flight time	32h 25m
Direct flights	None

The best one-way flight to London from Region of Siem Reap in the past 72 hours is £251. The best return flight deal from Region of Siem Reap to London found on momondo in the last 72 hours is £1,995.

The fastest flight from Region of Siem Reap to London takes 32h 25m

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

Search flight deals

Frequently asked questions about flying from Siem Reap to London

When did momondo last update prices for flights from Siem Reap to London?
Prices for flights from Siem Reap to London are updated daily.
How old do you have to be to fly from Siem Reap to London?
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 Siem Reap to London.
What documentation or ID do you need to fly to London?
The required travel and health documents for your London 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 London. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Eastbourne

Wembley

Gatwick

Milton Keynes

Southend-on-Sea

Luton

Slough

Ipswich

Maidstone

Folkestone

Hastings

Ilford

Canterbury

Chichester

Hayes

Bedford

Guildford

Colchester

Harlow

Chelmsford

Why use momondo?

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

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

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

All flight searches from Siem Reap to London on momondo can be filtered to show those which offer flexible booking policies.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to London from Siem Reap.

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

If you are not ready to book a flight from Siem Reap to London now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to London and let you know when they change.

An easier way to manage your London 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.

Start using Trips

Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

1 adult

Mon 5/10

Mon 12/10

Email me momondo's favourite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United Kingdom

Nearby airports

Cabin classes

Other United Kingdom destinations

Complete your trip

Feeling lucky

Fly into one of these airports located in London

London City Airport

London Gatwick Airport

London Heathrow Airport

London Luton Airport

London Southend Airport

London Stansted Airport

Cheap flights from Siem Reap to London from £251

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Siem Reap to London departing on 18/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Find the cheapest flights from Siem Reap to London

Cheap return flights

Cheap one-way flights

Big names, great deals

Big names, great deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Etihad Airways flights from Region of Siem Reap to London

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

Finnair flights from Region of Siem Reap to London

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

momondo Fare Finder

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

See travel insights to London from

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

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

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

Cheap Region of Siem Reap to London flight deals and tips

Best price found

Fastest flight time

Direct flights

Frequently asked questions about flying from Siem Reap to London

Travelling to a place near London?

Why use momondo?

An easier way to manage your London 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 the United Kingdom

Fly into one of these airports located in London

Airports listed have a maximum distance of 35.6 mi from London

Cabin classes currently available on flights to London

List of cabin classes available on flights landing in London. Availability may vary depending on flight origin and airline.

Popular Cities in the United Kingdom

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

Complete your trip to London

Explore popular destinations other users love

According to popular flight searches on momondo this year