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Cheap flights from Cambodia to London Heathrow Airport from £332

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 24/5. Fares are subject to change and may not be available on all flights or dates of travel.
KTI — LHR
18 May — 25 May1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Cambodia to Heathrow

Enter your travel dates to find the best prices.

Cheapest flights from Cambodia to Heathrow
Explore the most affordable flight options available from Cambodia to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 April 2026.

Sun 7/619:45
SAI
-
LHR
2 stops41h 10m
Multiple Airlines
Sun 21/610:00
LHR
-
SAI
2 stops26h 55m
Multiple Airlines
Deal found 17/4£704
Sun 31/513:05
SAI
-
LHR
2 stops48h 00m
Emirates
Tue 30/609:05
LHR
-
SAI
2 stops21h 10m
Emirates
Deal found 16/4£788
Sun 31/513:00
SAI
-
LHR
3 stops25h 00m
Multiple Airlines
Tue 30/616:00
LHR
-
SAI
2 stops20h 45m
Multiple Airlines
Deal found 16/4£1,009
Sun 7/618:05
SAI
-
LHR
1 stop29h 00m
Vietnam Airlines
Sun 21/619:50
LHR
-
SAI
1 stop15h 20m
Vietnam Airlines
Deal found 17/4£1,212

Find flight deals from Cambodia to Heathrow

Keep the following information in mind while searching for Cambodia to Heathrow flight deals. Data was last updated 18 April 2026.

Round-trip from

£704

One-way from

£332

Popular in

April

Cheapest in

November

Average price

£1,281
7/6-21/6
  • 7/6-21/6
  • 4 total stops
  • 68h 05m total
  • Cambodia to London
Search Deals
24/5
  • 24/5
  • 2 total stops
  • 27h 10m total
  • Cambodia to London
Search Deals
Highest demand for flights based on searches. 30% potential increase in price (£238 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 8% potential price decrease (£45 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Cambodia to Heathrow 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 18 April 2026.
Use the filters below to find and compare flights from Cambodia to London Heathrow Airport 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

Sun 7/6

19:45-06:55

2 stops41h 10m

London Heathrow

Sun 21/6

10:00-18:55

2 stops26h 55m

£704

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Sun 31/5

13:05-07:05

2 stops48h 00m

London Heathrow

Tue 30/6

09:05-12:15

2 stops21h 10m

£788

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Sun 31/5

13:00-08:00

3 stops25h 00m

London Heathrow

Tue 30/6

16:00-18:45

2 stops20h 45m

£1,009
Fastest return journey

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Sun 7/6

18:05-17:05

1 stop29h 00m

London Heathrow

Sun 21/6

19:50-17:10

1 stop15h 20m

£1,212
Cheapest one-way

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Sun 24/5

09:45-06:55

2 stops27h 10m

£332

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Thu 23/7

19:20-18:45

2 stops29h 25m

£374

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Sun 17/5

13:05-18:40

2 stops35h 35m

£390

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Sun 24/5

13:05-12:25

2 stops29h 20m

£390
Fastest single journey

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Thu 30/4

23:50-18:40

2 stops24h 50m

£456

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Wed 19/8

21:10-18:40

2 stops27h 30m

£468

Flights are sorted by cheapest return flights first.

Deals found on 13/4

Sorted by cheapest first

Best time to book a flight from Cambodia to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Cambodia 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 Cambodia to London Heathrow Airport

What is the cheapest month to book a flight from Cambodia to London Heathrow Airport?

Currently, November is the cheapest month in which you can book a flight from Cambodia to London Heathrow Airport (average of £451). Flying from Cambodia to London Heathrow Airport in January is currently the most expensive (average of £896). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Cambodia to Heathrow. 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 Cambodia to London Heathrow Airport?

    There are many flights that can get you from Cambodia to London Heathrow Airport in 48h. Fly via Emirates to get the fastest option. There are 6106 mi between Cambodia and London Heathrow Airport.

  • What are the cheapest airlines to fly from Cambodia to London Heathrow Airport one-way?

    The cheapet airlines for a one-way flight from Cambodia to London Heathrow Airport are Etihad Airways (£209), China Southern (£233), and China Eastern (£240).

  • Can I find deals for flights from Cambodia to Heathrow that include hotel bookings?

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

  • How can I find direct flights from Cambodia to Heathrow?

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

  • Can I find deals for business class flights from Cambodia to Heathrow?

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

  • What is the cheapest month to book a flight from Cambodia to London Heathrow Airport?

    Currently, November is the cheapest month in which you can book a flight from Cambodia to London Heathrow Airport (average of £451). Flying from Cambodia to London Heathrow Airport in January is currently the most expensive (average of £896). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Milton Keynes
Wembley
Croydon
Northampton
Hounslow
Luton
Gatwick
Slough
Ilford
Hayes
Brentford
Colchester
Watford
Kingston upon Thames
Romford
Eastbourne
Swindon
Chelmsford
Ipswich
Southend-on-Sea

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How does Cheapflights help users find flights from Cambodia to Heathrow?

Cheapflights makes it easy to find Cambodia to Heathrow flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Cambodia to Heathrow?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Heathrow from Cambodia.

Can Cheapflights find flights from Cambodia to Heathrow with no change fees?

Need flexible booking options for your flight to Heathrow from Cambodia? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Cambodia to Heathrow become cheaper?

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

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