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Cheap flights from Siem Reap to London from £288

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 15/6. Fares are subject to change and may not be available on all flights or dates of travel.
SAI — LON
9 cze — 16 cze1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Siem Reap to London

Enter your travel dates to find the best prices.

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 maja 2026.

ndz. 24/513:05
SAI
-
LHR
2 stops32h 15m
Multiple Airlines
ndz. 31/522:05
LHR
-
SAI
2 stops39h 00m
Multiple Airlines
Deal found 8/5£679
ndz. 24/513:05
SAI
-
LGW
2 stops36h 40m
Emirates
ndz. 31/514:35
LGW
-
SAI
2 stops39h 45m
Emirates
Deal found 8/5£761
pt. 18/1219:25
SAI
-
LHR
2 stops44h 45m
Finnair
pon. 4/116:15
LHR
-
SAI
2 stops37h 25m
Finnair
Deal found 6/5£791
pt. 18/1221:30
SAI
-
LHR
1 stop16h 45m
Vietnam Airlines
pon. 4/111:00
LHR
-
SAI
1 stop22h 55m
Vietnam Airlines
Deal found 9/5£876
ndz. 31/516:00
SAI
-
LHR
1 stop22h 00m
Singapore Airlines
czw. 25/609:25
LHR
-
SAI
1 stop18h 15m
Singapore Airlines
Deal found 5/5£948
ndz. 24/512:25
SAI
-
LGW
2 stops32h 35m
Multiple Airlines
ndz. 31/513:55
LGW
-
SAI
3 stops23h 10m
Multiple Airlines
Deal found 8/5£1,043
ndz. 24/516:00
SAI
-
LGW
1 stop20h 55m
Singapore Airlines
ndz. 31/510:10
LGW
-
SAI
1 stop17h 30m
Singapore Airlines
Deal found 8/5£2,016

Find flight deals from Siem Reap to London

Keep the following information in mind while searching for Siem Reap to London flight deals. Data was last updated 10 maja 2026.

Round-trip from

£679

One-way from

£288
24/5-31/5
  • 24/5-31/5
  • 4 total stops
  • 71h 15m total
  • Siem Reap to London
Search Deals
15/6
  • 15/6
  • 2 total stops
  • 24h 00m total
  • Siem Reap to London
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Siem Reap to London that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 10 maja 2026.
Use the filters below to find and compare flights from Siem Reap to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

ndz. 24/5

13:05-15:20

2 stops32h 15m

London Heathrow

ndz. 31/5

22:05-19:05

2 stops39h 00m

£679

Siem ReapLondon

SAI - LGW

SAILGW

Siem Reap–Angkor Intl

ndz. 24/5

13:05-19:45

2 stops36h 40m

London Gatwick

ndz. 31/5

14:35-12:20

2 stops39h 45m

£761

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

ndz. 31/5

16:00-08:00

1 stop22h 00m

London Heathrow

czw. 25/6

09:25-09:40

1 stop18h 15m

£948

Siem ReapLondon

SAI - LGW

SAILGW

Siem Reap–Angkor Intl

ndz. 24/5

12:25-15:00

2 stops32h 35m

London Gatwick

ndz. 31/5

13:55-19:05

3 stops23h 10m

£1,043
Fastest return journey

Siem ReapLondon

SAI - LGW

SAILGW

Siem Reap–Angkor Intl

ndz. 24/5

16:00-06:55

1 stop20h 55m

London Gatwick

ndz. 31/5

10:10-09:40

1 stop17h 30m

£2,016
Cheapest one-way

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

sob. 13/6

19:05-19:30

3 stops54h 25m

£290

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

ndz. 21/6

12:55-06:55

2 stops24h 00m

£293

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

ndz. 24/5

09:45-15:20

2 stops35h 35m

£295

Siem ReapLondon

SAI - LGW

SAILGW

Siem Reap–Angkor Intl

ndz. 21/6

19:05-06:35

3 stops41h 30m

£354

Siem ReapLondon

SAI - LGW

SAILGW

Siem Reap–Angkor Intl

wt. 16/6

15:10-06:40

3 stops21h 30m

£366

Flights are sorted by cheapest return flights first.

Deals found on 8/5

Showing 1-10 of 25 resultsSorted by cheapest first
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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.
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
No data available for this route at this time. Please check back soon.

Related info for your journey

Find useful and relevant information for your journey from Siem Reap to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • 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 22h. Fly via Emirates or Singapore Airlines to get the fastest option. The distance between Region of Siem Reap and London is about 6106 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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