How long is the flight from Siem Reap to London?

A quick flight from Siem Reap to London can take about 16h 45m. Emirates provides one of the quickest options available for as low as £872. The distance from Siem Reap to London is about 6106 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

In terms of precipitation, rainfall in London ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London when rainfall is around 40.0 mm.

If weather is an important factor for your trip to London, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

What is the cheapest time of day to fly from SAI to LON?

When flying from Siem Reap to London, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

What airport do you fly from for flights from Siem Reap to London?

Siem Reap–Angkor Intl (SAI), located 24.7 mi from the city center, is the airport you fly out of when you book flights from Siem Reap to London. 0 airlines have flights from Siem Reap–Angkor Intl to London on a regular basis. Booking flights from Siem Reap–Angkor Intl to London should not be difficult; the airport handles an average of 0 outbound flights to London per day.

Can I find deals for flights from Siem Reap to London that include hotel bookings?

Yes. In addition to deals on Siem Reap to London flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from Siem Reap to London?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Siem Reap to London.

Can I find deals for business class flights from Siem Reap to London?

Yes. Cheapflights offers flight deals from Siem Reap to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£248+ Cheap Flights from Siem Reap, Cambodia to London

Cheap flight deals from Siem Reap to London

Enter your travel dates to find the best prices.

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Best

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Cheapest flights from Siem Reap to London
Explore the most affordable flight options available from Siem Reap to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 August 2026.

Sat 19/1222:00 -

2 stops47h 00m

Fri 1/110:30 -

3 stops27h 30m

Deal found 10/8£635

Wed 16/1216:50 -

1 stop27h 15m

Fri 1/109:50 -

1 stop23h 15m

Deal found 10/8£688

Fri 18/1216:50 -

1 stop27h 15m

Fri 1/109:50 -

1 stop23h 15m

Deal found 10/8£695

Thu 13/819:05 -

2 stops30h 05m

Thu 3/911:35 -

2 stops24h 30m

Deal found 9/8£699

Wed 16/1216:50 -

1 stop27h 15m

Mon 4/117:35 -

1 stop15h 30m

Deal found 10/8£702

Fri 18/1216:50 -

1 stop27h 15m

Mon 4/117:35 -

1 stop15h 30m

Deal found 10/8£709

Sat 19/1222:00 -

2 stops47h 00m

Thu 31/1210:30 -

2 stops51h 30m

Deal found 10/8£713

Thu 17/1209:50 -

1 stop18h 15m

Fri 1/106:20 -

1 stop19h 25m

Deal found 10/8£757

Thu 17/1209:50 -

1 stop18h 15m

Mon 4/106:25 -

1 stop26h 35m

Deal found 10/8£771

Thu 13/817:55 -

2 stops29h 45m

Thu 3/921:45 -

2 stops31h 30m

Deal found 9/8£792

Thu 17/1209:50 -

1 stop18h 15m

Wed 30/1210:30 -

2 stops26h 10m

Deal found 10/8£793

Fri 18/1219:25 -

2 stops44h 45m

Fri 1/110:20 -

2 stops39h 55m

Deal found 10/8£826

Find flight deals from Siem Reap to London

Round-trip from	£635
One-way from	£248

China Eastern
19/12-1/1
5 total stops
74h 30m total
Siem Reap to London

Search Deals

26/11
2 total stops
55h 05m total
Siem Reap to London

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LGW London Gatwick

SAILGW

Siem Reap–Angkor Intl

Mon 21/12

13:20-18:25

2 stops36h 05m

London Gatwick

Thu 31/12

23:55-21:10

2 stops38h 15m

£841

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LHR London Heathrow

SAILHR

Siem Reap–Angkor Intl

Fri 28/8

21:10-18:40

2 stops27h 30m

London Heathrow

Thu 10/9

08:45-18:55

2 stops28h 10m

£851

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LHR London Heathrow

SAILHR

Siem Reap–Angkor Intl

Sun 20/12

09:55-14:30

2 stops35h 35m

London Heathrow

Wed 30/12

20:55-12:40

2 stops32h 45m

£870

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LHR London Heathrow

SAILHR

Siem Reap–Angkor Intl

Mon 21/12

09:55-06:40

2 stops27h 45m

London Heathrow

Thu 31/12

20:55-09:15

2 stops29h 20m

£870

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LHR London Heathrow

SAILHR

Siem Reap–Angkor Intl

Fri 18/12

21:30-07:15

1 stop16h 45m

London Heathrow

Sat 2/1

11:00-20:30

1 stop26h 30m

£872

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LGW London Gatwick

SAILGW

Siem Reap–Angkor Intl

Thu 17/12

23:50-20:50

2 stops28h 00m

London Gatwick

Tue 29/12

23:55-12:40

2 stops29h 45m

£875

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LGW London Gatwick

SAILGW

Siem Reap–Angkor Intl

Mon 21/12

13:20-18:25

2 stops36h 05m

London Gatwick

Sat 2/1

23:55-21:10

2 stops62h 15m

£883

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LGW London Gatwick

SAILGW

Siem Reap–Angkor Intl

Fri 18/12

13:20-06:40

2 stops24h 20m

London Gatwick

Wed 30/12

09:40-12:40

2 stops20h 00m

£903

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LGW London Gatwick

SAILGW

Siem Reap–Angkor Intl

Mon 21/12

13:20-11:40

2 stops29h 20m

London Gatwick

Tue 29/12

23:55-12:40

2 stops29h 45m

£903

Fastest return journey

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LHR London Heathrow

SAILHR

Siem Reap–Angkor Intl

Mon 21/12

21:30-07:15

1 stop16h 45m

London Heathrow

Wed 30/12

11:00-19:40

1 stop25h 40m

£941

Flights are sorted by cheapest return flights first.

Deals found on 10/8

Showing 1-10 of 32 resultsSorted by cheapest first

Best time to book a flight from Siem Reap to London

Have a flexible travel schedule? Discover the best time to fly to London from Siem Reap with our price prediction graph.

SAI-LON

SAI-LGW

SAI-LHR

Estimated return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Siem Reap to London

SAI-LON

SAI-LGW

SAI-LHR

No data available for this route at this time. Please check back soon.

Related info for your journey

What airport do you fly from for flights from Siem Reap to London?
Siem Reap–Angkor Intl (SAI), located 24.7 mi from the city center, is the airport you fly out of when you book flights from Siem Reap to London. 0 airlines have flights from Siem Reap–Angkor Intl to London on a regular basis. Booking flights from Siem Reap–Angkor Intl to London should not be difficult; the airport handles an average of 0 outbound flights to London per day.
How long is the flight from Siem Reap to London?
A quick flight from Siem Reap to London can take about 16h 45m. Emirates provides one of the quickest options available for as low as £872. The distance from Siem Reap to London is about 6106 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.
Can I find deals for flights from Siem Reap to London that include hotel bookings?
Yes. In addition to deals on Siem Reap to London flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Siem Reap to London?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Siem Reap to London.
Can I find deals for business class flights from Siem Reap to London?
Yes. Cheapflights offers flight deals from Siem Reap to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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Why should you use Cheapflights to find cheap flight tickets from Siem Reap to London?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Siem Reap to London.

Can Cheapflights find flights from Siem Reap to London with no change fees?

Certainly. Search results for flights to London from Siem Reap shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Siem Reap to London become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to London from Siem Reap today and book when prices fit your budget.

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Cheap flights from Siem Reap, Cambodia to London from £248

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 26/11. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Siem Reap to London

Cheapest flights from Siem Reap to LondonExplore the most affordable flight options available from Siem Reap to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 August 2026.

Explore the most affordable flight options available from Siem Reap to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 August 2026.

Best flights from Siem Reap to LondonDiscover carefully curated flight deals from Siem Reap to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 11 August 2026.

Discover carefully curated flight deals from Siem Reap to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 11 August 2026.

Last-minute flights from Siem Reap to LondonDiscover last-minute flight deals from Siem Reap to London. Data last updated 11 August 2026 and is based on user searches.

Discover last-minute flight deals from Siem Reap to London. Data last updated 11 August 2026 and is based on user searches.

One-way flights from Siem Reap to LondonSearch for one-way flight options from Siem Reap to London. Find affordable one-way fares based on user searches. Data last updated 11 August 2026.

Search for one-way flight options from Siem Reap to London. Find affordable one-way fares based on user searches. Data last updated 11 August 2026.

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Best time to book a flight from Siem Reap to London

Have a flexible travel schedule? Discover the best time to fly to London from Siem Reap with our price prediction graph.

Cheapflights Insights

Related info for your journey

What airport do you fly from for flights from Siem Reap to London?

How long is the flight from Siem Reap to London?

Can I find deals for flights from Siem Reap to London that include hotel bookings?

How can I find direct flights from Siem Reap to London?

Can I find deals for business class flights from Siem Reap to London?

Travelling to a place near London?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Siem Reap to London

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Complete your trip

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Direct flights to England

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Search flights from Siem Reap to London by cabin class

Find flights from Siem Reap to London, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Other flights to London

Explore flights to London departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 11 August 2026.

Siem Reap and London flights

Browse other Siem Reap and London flight options. Last updated on 11 August 2026.

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How does Cheapflights help users find flights from Siem Reap to London?

Why should you use Cheapflights to find cheap flight tickets from Siem Reap to London?

Can Cheapflights find flights from Siem Reap to London with no change fees?

Can Cheapflights notify me if prices for flights from Siem Reap to London become cheaper?

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Cheapest flights from Siem Reap to London
Explore the most affordable flight options available from Siem Reap to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 August 2026.

Best flights from Siem Reap to London
Discover carefully curated flight deals from Siem Reap to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 11 August 2026.

Last-minute flights from Siem Reap to London
Discover last-minute flight deals from Siem Reap to London. Data last updated 11 August 2026 and is based on user searches.

One-way flights from Siem Reap to London
Search for one-way flight options from Siem Reap to London. Find affordable one-way fares based on user searches. Data last updated 11 August 2026.