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Cheap flights from London Heathrow Airport to Krong Preah Sihanouk from £426

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 1/11. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — KOS
1 Sep — 8 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Heathrow to Krong Preah Sihanouk

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to Krong Preah Sihanouk
Explore the most affordable flight options available from Heathrow to Krong Preah Sihanouk. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 2 August 2026.

Mon 14/922:05
LHR
-
KOS
2 stops29h 10m
Multiple Airlines
Mon 21/911:20
KOS
-
LHR
3 stops38h 30m
Multiple Airlines
Deal found 31/7£781
Fri 11/906:00
LHR
-
KOS
3 stops23h 45m
Multiple Airlines
Fri 25/913:30
KOS
-
LHR
2 stops30h 55m
Multiple Airlines
Deal found 28/7£828
Sat 12/920:40
LHR
-
KOS
2 stops41h 00m
Multiple Airlines
Sat 19/909:50
KOS
-
LHR
2 stops27h 40m
Multiple Airlines
Deal found 28/7£838
Thu 15/1006:40
LHR
-
KOS
3 stops27h 00m
Multiple Airlines
Tue 20/1013:35
KOS
-
LHR
3 stops35h 45m
Multiple Airlines
Deal found 30/7£849
Sun 13/916:00
LHR
-
KOS
2 stops21h 40m
Multiple Airlines
Sun 20/909:50
KOS
-
LHR
2 stops26h 35m
Multiple Airlines
Deal found 30/7£889
Sun 18/1012:35
LHR
-
KOS
2 stops25h 05m
Multiple Airlines
Sun 25/1013:35
KOS
-
LHR
3 stops32h 10m
Multiple Airlines
Deal found 29/7£890
Fri 18/908:25
LHR
-
KOS
2 stops42h 50m
Multiple Airlines
Sun 27/909:50
KOS
-
LHR
2 stops33h 25m
Multiple Airlines
Deal found 29/7£893
Tue 15/906:30
LHR
-
KOS
2 stops24h 30m
Multiple Airlines
Tue 22/912:15
KOS
-
LHR
2 stops32h 55m
Multiple Airlines
Deal found 1/8£895

Find flight deals from Heathrow to Krong Preah Sihanouk

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Krong Preah Sihanouk (KOS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 2 August 2026.

Round-trip from

£781

One-way from

£426
14/9-21/9
  • 14/9-21/9
  • 5 total stops
  • 67h 40m total
  • London to Krong Preah Sihanouk
Search Deals
1/11
  • 1/11
  • 2 total stops
  • 31h 35m total
  • London to Krong Preah Sihanouk
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow to Krong Preah Sihanouk 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 2 August 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Krong Preah Sihanouk that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonKrong Preah Sihanouk

LHR - KOS

LHRKOS

London Heathrow

Thu 15/10

06:40-15:40

3 stops27h 00m

Krong Preah Sihanouk Sihanoukville

Tue 20/10

13:35-19:20

3 stops35h 45m

£849

LondonKrong Preah Sihanouk

LHR - KOS

LHRKOS

London Heathrow

Sun 18/10

12:35-19:40

2 stops25h 05m

Krong Preah Sihanouk Sihanoukville

Sun 25/10

13:35-14:00

2 stops31h 25m

£896

LondonKrong Preah Sihanouk

LHR - KOS

LHRKOS

London Heathrow

Fri 11/9

16:00-09:15

2 stops35h 15m

Krong Preah Sihanouk Sihanoukville

Fri 25/9

07:15-14:10

2 stops36h 55m

£896

LondonKrong Preah Sihanouk

LHR - KOS

LHRKOS

London Heathrow

Tue 15/9

20:40-19:40

2 stops41h 00m

Krong Preah Sihanouk Sihanoukville

Tue 22/9

07:15-06:30

2 stops29h 15m

£899
Fastest return journey

LondonKrong Preah Sihanouk

LHR - KOS

LHRKOS

London Heathrow

Mon 14/9

09:30-11:45

2 stops20h 15m

Krong Preah Sihanouk Sihanoukville

Mon 21/9

13:30-07:00

2 stops23h 30m

£903

LondonKrong Preah Sihanouk

LHR - KOS

LHRKOS

London Heathrow

Fri 11/9

16:00-09:15

2 stops35h 15m

Krong Preah Sihanouk Sihanoukville

Fri 18/9

07:15-14:10

2 stops36h 55m

£904

LondonKrong Preah Sihanouk

LHR - KOS

LHRKOS

London Heathrow

Sat 12/9

19:25-19:40

2 stops42h 15m

Krong Preah Sihanouk Sihanoukville

Sat 19/9

09:50-07:30

2 stops27h 40m

£905

LondonKrong Preah Sihanouk

LHR - KOS

LHRKOS

London Heathrow

Fri 18/9

21:20-09:15

2 stops29h 55m

Krong Preah Sihanouk Sihanoukville

Sun 27/9

13:30-16:35

1 stop33h 05m

£999

LondonKrong Preah Sihanouk

LHR - KOS

LHRKOS

London Heathrow

Sun 1/11

21:10-11:45

2 stops31h 35m

Krong Preah Sihanouk Sihanoukville

Sun 8/11

13:35-05:35

1 stop23h 00m

£1,002
Cheapest one-way
Fastest single journey

LondonKrong Preah Sihanouk

LHR - KOS

LHRKOS

London Heathrow

Sun 1/11

09:55-11:45

3 stops42h 50m

£454

Flights are sorted by cheapest return flights first.

Deals found on 30/7

Showing 1-10 of 11 resultsSorted by cheapest first
1
2

Best time to book a flight from Heathrow to Krong Preah Sihanouk

Have a flexible travel schedule? Discover the best time to fly to Krong Preah Sihanouk from Heathrow 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.

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Krong Preah Sihanouk. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Krong Preah Sihanouk from London Heathrow?

    Located just 7.8 mi from the city center, Krong Preah Sihanouk Sihanoukville is the airport most travelers will use when flying to Krong Preah Sihanouk from London Heathrow. Booking flights from London Heathrow to Sihanoukville (KOS) should be relatively easy as there are 0 daily inbound flights from London Heathrow from 0 different airlines.

  • Can I find deals for flights from Heathrow to Krong Preah Sihanouk that include hotel bookings?

    Yes. In addition to deals on Heathrow to Krong Preah Sihanouk flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Heathrow to Krong Preah Sihanouk?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Krong Preah Sihanouk.

  • Can I find deals for business class flights from Heathrow to Krong Preah Sihanouk?

    Yes. Cheapflights offers flight deals from Heathrow to Krong Preah Sihanouk 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

Travelling to a place near Krong Preah Sihanouk?

Book flights to Krong Preah Sihanouk if you plan to visit one of these locations
Kampot

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Alternative routes for Heathrow to Krong Preah Sihanouk

See prices for flight routes from nearby airports that may be better suited for you.
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Gatwick to Krong Preah Sihanouk flights
Luton to Siem Reap flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Heathrow to Krong Preah Sihanouk?

Cheapflights helps you search for flights from Heathrow to Krong Preah Sihanouk 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 Heathrow to Krong Preah Sihanouk?

Cheapflights simply makes it quick and affordable to book flights from Heathrow to Krong Preah Sihanouk by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Heathrow to Krong Preah Sihanouk with no change fees?

Yes, we can. To see specific flights from Heathrow to Krong Preah Sihanouk with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Heathrow to Krong Preah Sihanouk become cheaper?

Yes, Cheapflights offers price alerts on Heathrow to Krong Preah Sihanouk flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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