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Cheap flights from Cambodia to London Heathrow Airport from £243

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 11/5. Fares are subject to change and may not be available on all flights or dates of travel.
KTI — LHR
17 Mar — 24 Mar1
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 15 February 2026.

Thu 19/309:50
SAI
-
LHR
1 stop16h 45m
Thai Airways
Thu 19/321:35
LHR
-
SAI
1 stop28h 10m
Thai Airways
Deal found 12/2£993
Thu 19/309:55
SAI
-
LHR
1 stop16h 10m
Multiple Airlines
Thu 19/321:20
LHR
-
SAI
3 stops35h 00m
Multiple Airlines
Deal found 12/2£1,025
Thu 19/209:50
SAI
-
LHR
1 stop16h 45m
Multiple Airlines
Thu 19/222:00
LHR
-
SAI
2 stops40h 10m
Multiple Airlines
Deal found 14/2£1,146
Thu 19/209:50
SAI
-
LHR
1 stop16h 45m
Thai Airways
Thu 19/221:35
LHR
-
SAI
1 stop28h 10m
Thai Airways
Deal found 14/2£1,733

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 15 February 2026.

Round-trip from

£993

One-way from

£243

Popular in

July

Cheapest in

November

Average price

£696
Thai Airways
  • Thai Airways
  • 19/3-19/3
  • 2 total stops
  • 44h 55m total
  • Cambodia to London
Search Deals
China Eastern
  • China Eastern
  • 11/5
  • 2 total stops
  • 27h 30m total
  • Cambodia to London
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (£89 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£23 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 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 15 February 2026.
Use the filters below to find and compare flights from Cambodia to London Heathrow Airport that are best for you.

Fly from

Cambodia

Fly to

Heathrow

Route

Depart

Return

Price

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Thu 19/3

09:50-19:35

1 stop16h 45m

London Heathrow

Thu 19/3

21:35-08:45

1 stop28h 10m

£993

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Thu 19/3

09:55-19:05

1 stop16h 10m

London Heathrow

Thu 19/3

21:20-15:20

3 stops35h 00m

£1,025

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Wed 20/5

21:10-18:40

2 stops27h 30m

£248

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Tue 24/2

22:00-17:30

2 stops50h 30m

£252

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Mon 11/5

21:10-18:40

3 stops51h 30m

£254

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Mon 30/3

21:10-18:40

2 stops51h 30m

£256

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Wed 20/5

19:05-19:30

3 stops54h 25m

£272

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Sat 9/5

14:55-20:00

3 stops35h 05m

£286

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Sat 28/3

22:00-17:40

3 stops50h 40m

£307

Siem ReapLondon

SAI - LHR

SAILHR

Siem Reap–Angkor Intl

Fri 3/4

21:10-18:40

3 stops51h 30m

£307

Flights are sorted by cheapest return flights first.

Deals found on 13/2

Showing 1-10 of 11 results
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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, March is the cheapest month in which you can book a flight from Cambodia to London Heathrow Airport (average of £465). Flying from Cambodia to London Heathrow Airport in January is currently the most expensive (average of £953). 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 16h 45m. Fly via Thai Airways 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 (£207), China Southern (£237), and China Eastern (£238).

  • 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, March is the cheapest month in which you can book a flight from Cambodia to London Heathrow Airport (average of £465). Flying from Cambodia to London Heathrow Airport in January is currently the most expensive (average of £953). 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
Croydon
Luton
Wembley
Northampton
Gatwick
Slough
Hounslow
Ilford
Hayes
Brentford
Colchester
Watford
Guildford
Chelmsford
Eastbourne
Crawley
Kingston upon Thames
Ipswich
Swindon

Browse thousands of different options on Cheapflights for your next trip

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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 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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