How long is the flight from Region of Siem Reap to London?

There are many flights that can get you from Region of Siem Reap to London in 28h. Fly via Emirates, China Eastern, or Etihad Airways to get the fastest option. The distance between Region of Siem Reap and London is about 6102 mi. Both multi-stop and direct flights can be found to your destination and back.

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 SI to LON?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Region of Siem Reap to London as you normally would.

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.

£216+ Cheap Flights from Siem Reap to London

Cheap flight deals from Siem Reap to London

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

One-way

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 10 November 2026.

Sat 26/1216:50 -

1 stop30h 05m

Sun 17/111:35 -

2 stops38h 40m

Deal found 5/11£667

Sat 26/1223:50 -

2 stops28h 00m

Sun 17/120:25 -

2 stops41h 45m

Deal found 5/11£677

Sat 26/1221:05 -

2 stops51h 25m

Sun 17/121:00 -

2 stops40h 05m

Deal found 5/11£704

Sat 26/1221:05 -

3 stops47h 55m

Sun 17/110:30 -

2 stops50h 35m

Deal found 5/11£706

Mon 30/1117:55 -

2 stops31h 15m

Wed 30/1213:55 -

2 stops36h 20m

Deal found 10/11£777

Sat 26/1220:30 -

1 stop17h 45m

Sun 17/121:00 -

2 stops35h 50m

Deal found 5/11£789

Mon 9/1119:25 -

2 stops29h 35m

Mon 16/1120:55 -

2 stops32h 45m

Deal found 9/11£831

Mon 9/1123:20 -

2 stops50h 50m

Mon 16/1121:35 -

1 stop16h 35m

Deal found 9/11£869

Mon 9/1119:05 -

2 stops42h 25m

Mon 16/1113:05 -

1 stop19h 55m

Deal found 9/11£933

Mon 30/1109:50 -

1 stop16h 45m

Wed 30/1213:55 -

2 stops36h 20m

Deal found 10/11£959

Mon 30/1121:30 -

1 stop16h 45m

Wed 30/1211:00 -

1 stop25h 40m

Deal found 10/11£1,049

Mon 30/1113:20 -

2 stops29h 20m

Wed 30/1209:40 -

2 stops28h 30m

Deal found 10/11£1,101

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 10 November 2026.

Sat 26/1223:50 -

2 stops28h 00m

Sun 17/120:25 -

2 stops41h 45m

Deal found 5/11£677

Sat 26/1221:05 -

2 stops51h 25m

Sun 17/121:00 -

2 stops40h 05m

Deal found 5/11£704

Mon 30/1117:55 -

2 stops31h 15m

Wed 30/1213:55 -

2 stops36h 20m

Deal found 10/11£777

Thu 11/309:50 -

1 stop16h 45m

Thu 11/321:35 -

1 stop28h 10m

Deal found 10/11£940

Mon 30/1121:30 -

1 stop16h 45m

Wed 30/1211:00 -

1 stop25h 40m

Deal found 10/11£1,049

Sat 26/1209:55 -

2 stops18h 45m

Sun 17/115:30 -

3 stops20h 15m

Deal found 5/11£1,105

Mon 30/1116:50 -

1 stop20h 35m

Wed 30/1209:20 -

1 stop23h 40m

Deal found 7/11£1,314

Mon 30/1113:20 -

2 stops29h 20m

Wed 30/1209:40 -

2 stops28h 30m

Deal found 10/11£1,101

Sat 26/1221:05 -

3 stops47h 55m

Sun 17/110:30 -

3 stops50h 35m

Deal found 5/11£1,107

Thu 11/309:55 -

1 stop16h 10m

Thu 11/321:20 -

3 stops35h 30m

Deal found 10/11£1,294

Mon 30/1122:25 -

2 stops24h 55m

Wed 30/1210:55 -

2 stops18h 45m

Deal found 7/11£1,381

Mon 12/419:25 -

2 stops29h 35m

Fri 30/412:30 -

2 stops24h 15m

Deal found 10/11£2,176

Mon 12/412:55 -

2 stops38h 35m

Fri 30/421:45 -

2 stops17h 45m

Deal found 10/11£2,644

Mon 12/412:55 -

2 stops37h 20m

Fri 30/409:05 -

2 stops30h 25m

Deal found 6/11£2,680

Mon 12/410:30 -

1 stop28h 30m

Fri 30/410:10 -

1 stop17h 30m

Deal found 7/11£3,391

Mon 12/417:20 -

3 stops29h 20m

Fri 30/417:35 -

2 stops19h 05m

Deal found 6/11£3,464

Find flight deals from Siem Reap to London

Round-trip from	£667
One-way from	£216

26/12-17/1
3 total stops
68h 45m total
Siem Reap to London

Search Deals

19/12-31/12
2 total stops
43h 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 - STN London Stansted

SAISTN

Siem Reap–Angkor Intl

Fri 11/12

16:50-07:30

2 stops45h 40m

London Stansted

Wed 31/12

00:00-06:00

Nonstop0h 00m

£246

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LGW London Gatwick

SAILGW

Siem Reap–Angkor Intl

Sun 21/2

19:05-14:00

2 stops25h 55m

London Gatwick

Wed 31/12

00:00-06:00

Nonstop0h 00m

£250

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LHR London Heathrow

SAILHR

Siem Reap–Angkor Intl

Sun 21/2

19:05-06:25

2 stops42h 20m

London Heathrow

Wed 31/12

00:00-06:00

Nonstop0h 00m

£260

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LHR London Heathrow

SAILHR

Siem Reap–Angkor Intl

Thu 10/12

19:05-19:10

2 stops31h 05m

London Heathrow

Wed 31/12

00:00-06:00

Nonstop0h 00m

£261

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LGW London Gatwick

SAILGW

Siem Reap–Angkor Intl

Thu 10/12

09:50-21:05

1 stop18h 15m

London Gatwick

Wed 31/12

00:00-06:00

Nonstop0h 00m

£263

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LGW London Gatwick

SAILGW

Siem Reap–Angkor Intl

Sat 12/12

20:30-07:10

2 stops41h 40m

London Gatwick

Wed 31/12

00:00-06:00

Nonstop0h 00m

£266

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LHR London Heathrow

SAILHR

Siem Reap–Angkor Intl

Sat 12/12

11:20-14:10

2 stops33h 50m

London Heathrow

Wed 31/12

00:00-06:00

Nonstop0h 00m

£281

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LGW London Gatwick

SAILGW

Siem Reap–Angkor Intl

Fri 11/12

21:30-14:00

2 stops23h 30m

London Gatwick

Wed 31/12

00:00-06:00

Nonstop0h 00m

£293

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LHR London Heathrow

SAILHR

Siem Reap–Angkor Intl

Fri 11/12

21:30-19:10

2 stops28h 40m

London Heathrow

Wed 31/12

00:00-06:00

Nonstop0h 00m

£296

Siem ReapLondon

SAI Siem Reap–Angkor Intl - LGW London Gatwick

SAILGW

Siem Reap–Angkor Intl

Tue 17/11

21:30-14:10

2 stops23h 40m

London Gatwick

Wed 31/12

00:00-06:00

Nonstop0h 00m

£299

Flights are sorted by cheapest return flights first.

Deals found on 8/11

Showing 1-10 of 43 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-LGW

SAI-LHR

SAI-STN

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

KHSI-LON

SAI-LGW

SAI-LHR

SAI-STN

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

Related info for your journey

How long is the flight from Region of Siem Reap to London?
There are many flights that can get you from Region of Siem Reap to London in 28h. Fly via Emirates, China Eastern, or Etihad Airways to get the fastest option. The distance between Region of Siem Reap and London is about 6102 mi. Both multi-stop and direct flights can be found to your destination and back.
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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Cheapflights helps you search for flights from Siem Reap to London via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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

Cheapflights helps you find that perfect flight to London from Siem Reap by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

Users can book flights with no change fees policies with our dedicated filters. Book flights from Siem Reap to London flexibly with Cheapflights today.

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Not ready to book yet? You can track prices for flights from Siem Reap to London on Cheapflights with our Price Alert feature and get notified when better prices are available.

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Cheap flights from Siem Reap to London from £216

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 19/12. 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 10 November 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 10 November 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 10 November 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 10 November 2026.

Last-minute flights from Siem Reap to LondonDiscover last-minute flight deals from Siem Reap to London. Data last updated 10 November 2026 and is based on user searches.

Discover last-minute flight deals from Siem Reap to London. Data last updated 10 November 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 10 November 2026.

Search for one-way flight options from Siem Reap to London. Find affordable one-way fares based on user searches. Data last updated 10 November 2026.

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

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

How long is the flight from Region of 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

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to London by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to England

Book a non-stop flight to one of these other cities located in England.

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 10 November 2026.

Siem Reap and London flights

Browse other Siem Reap and London flight options. Last updated on 10 November 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?

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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 10 November 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 10 November 2026.

Last-minute flights from Siem Reap to London
Discover last-minute flight deals from Siem Reap to London. Data last updated 10 November 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 10 November 2026.