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Cheap flights from London Heathrow Airport to Cambodia from £354

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 30/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — KTI
8 Apr — 15 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Heathrow to Cambodia

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to Cambodia
Explore the most affordable flight options available from Heathrow to Cambodia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 9 March 2026.

Tue 8/913:50
LHR
-
SAI
2 stops22h 55m
SWISS
Wed 16/909:40
SAI
-
LHR
2 stops28h 15m
SWISS
Deal found 4/3£538
Wed 16/912:20
LHR
-
SAI
2 stops24h 25m
Multiple Airlines
Wed 30/909:40
SAI
-
LHR
2 stops18h 05m
Multiple Airlines
Deal found 5/3£542
Wed 2/913:50
LHR
-
SAI
2 stops22h 55m
SWISS
Wed 16/909:40
SAI
-
LHR
2 stops28h 15m
SWISS
Deal found 7/3£544
Wed 25/1118:40
LHR
-
SAI
2 stops32h 10m
SWISS
Wed 9/1209:55
SAI
-
LHR
2 stops18h 45m
SWISS
Deal found 4/3£566
Thu 19/1121:00
LHR
-
SAI
2 stops33h 15m
Multiple Airlines
Thu 3/1222:00
SAI
-
LHR
3 stops50h 30m
Multiple Airlines
Deal found 7/3£580
Tue 20/1018:40
LHR
-
SAI
2 stops33h 00m
SWISS
Thu 19/1116:45
SAI
-
LHR
2 stops22h 20m
SWISS
Deal found 5/3£589
Sun 6/906:00
LHR
-
SAI
2 stops30h 45m
SWISS
Mon 14/910:30
SAI
-
LHR
2 stops27h 25m
SWISS
Deal found 4/3£591
Sun 18/1021:20
LHR
-
SAI
3 stops64h 50m
China Eastern
Thu 5/1122:00
SAI
-
LHR
3 stops50h 30m
China Eastern
Deal found 4/3£592
Wed 16/921:20
LHR
-
SAI
3 stops40h 50m
China Eastern
Wed 14/1021:10
SAI
-
LHR
2 stops27h 30m
China Eastern
Deal found 5/3£593
Tue 17/1121:00
LHR
-
SAI
2 stops41h 00m
China Eastern
Thu 3/1222:00
SAI
-
LHR
2 stops50h 30m
China Eastern
Deal found 7/3£594
Sun 5/421:20
LHR
-
SAI
3 stops64h 50m
China Eastern
Fri 1/521:10
SAI
-
LHR
2 stops51h 30m
China Eastern
Deal found 4/3£609
Thu 19/1121:00
LHR
-
SAI
3 stops41h 00m
China Eastern
Thu 3/1222:00
SAI
-
LHR
3 stops50h 30m
China Eastern
Deal found 7/3£612

Find flight deals from Heathrow to Cambodia

Keep the following information in mind while searching for Heathrow to Cambodia flight deals. Data was last updated 9 March 2026.

Round-trip from

£544

One-way from

£354

Popular in

July

Cheapest in

November

Average price

£617
SWISS
  • SWISS
  • 2/9-16/9
  • 4 total stops
  • 51h 10m total
  • London to Cambodia
Search Deals
30/4
  • 30/4
  • 3 total stops
  • 34h 35m total
  • London to Cambodia
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. 3% potential price decrease (£18 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow to Cambodia 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 9 March 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Cambodia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonKrong Preah Sihanouk

LHR - KOS

LHRKOS

London Heathrow

Sun 19/4

08:25-13:00

2 stops22h 35m

Krong Preah Sihanouk Sihanoukville

Sun 26/4

13:30-06:30

2 stops23h 00m

£775
Fastest return journey

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Mon 20/4

18:55-17:10

1 stop16h 15m

Siem Reap–Angkor Intl

Mon 4/5

19:10-17:50

1 stop28h 40m

£780

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Fri 1/5

11:20-09:40

1 stop16h 20m

Siem Reap–Angkor Intl

Wed 27/5

16:00-15:45

1 stop29h 45m

£794

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Fri 22/5

06:55-17:10

2 stops28h 15m

Siem Reap–Angkor Intl

Sun 31/5

18:05-17:05

1 stop29h 00m

£794

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Mon 20/4

20:35-09:40

1 stop31h 05m

Siem Reap–Angkor Intl

Mon 4/5

10:30-05:55

1 stop25h 25m

£798

LondonKrong Preah Sihanouk

LHR - KOS

LHRKOS

London Heathrow

Thu 23/4

08:25-13:00

2 stops22h 35m

Krong Preah Sihanouk Sihanoukville

Thu 30/4

12:15-06:25

2 stops24h 10m

£830

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Sun 5/4

20:45-09:00

2 stops30h 15m

Siem Reap–Angkor Intl

Sun 3/5

09:40-07:00

2 stops27h 20m

£860

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Sun 5/4

19:50-18:20

2 stops40h 30m

Siem Reap–Angkor Intl

Sun 3/5

18:05-17:05

1 stop29h 00m

£997

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Wed 12/8

09:00-17:10

2 stops26h 10m

Siem Reap–Angkor Intl

Mon 24/8

18:05-17:50

2 stops29h 45m

£1,040

LondonSiem Reap

LHR - SAI

LHRSAI

London Heathrow

Tue 11/8

19:50-17:10

2 stops39h 20m

Siem Reap–Angkor Intl

Sun 23/8

19:10-17:05

2 stops27h 55m

£1,065

Flights are sorted by cheapest return flights first.

Deals found on 6/3

Showing 1-10 of 24 resultsSorted by cheapest first
1
2
3

Best time to book a flight from Heathrow to Cambodia

Have a flexible travel schedule? Discover the best time to fly to Cambodia 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.

Cheapflights Insights

Everything you need to know about your flight from London Heathrow Airport to Cambodia

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

Currently, November is the cheapest month in which you can book a flight from London Heathrow Airport to Cambodia (average of £371). Flying from London Heathrow Airport to Cambodia in July is currently the most expensive (average of £694). 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.

Reviews of airlines servicing Cambodia

Get insights into the airlines that provide service to Cambodia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Cambodia. Reviews last updated 9 March 2026.
Read through reviews of airlines operating flights from London Heathrow Airport to Cambodia, such as Singapore Airlines,Thai Airways, andChina Southern. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Singapore Airlines
8.2
Very Good
1,471 reviews
Check prices

Crew

8.6

Entertainment

8.0

Overall

8.2

Food

7.8

Boarding

8.3

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Wee Keng,Dec 2025

HKG - SIN

Quick 3 hour flight with excellent service from the crew despite it being Christmas Day holiday. Ground crew passed out Xmas cookies as well. Great experience.
Singapore Airlines
8.2
Very Good
1,471 reviews
Singapore Airlines
8.2
Very Good
1,471 reviews
Check prices

Crew

8.6

Entertainment

8.0

Overall

8.2

Food

7.8

Boarding

8.3

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Wee Keng,Dec 2025

HKG - SIN

Quick 3 hour flight with excellent service from the crew despite it being Christmas Day holiday. Ground crew passed out Xmas cookies as well. Great experience.
Thai Airways
7.8
Good
391 reviews
Singapore Airlines
8.2
Very Good
1,471 reviews
Check prices

Crew

8.6

Entertainment

8.0

Overall

8.2

Food

7.8

Boarding

8.3

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Wee Keng,Dec 2025

HKG - SIN

Quick 3 hour flight with excellent service from the crew despite it being Christmas Day holiday. Ground crew passed out Xmas cookies as well. Great experience.
China Southern
7.4
Good
142 reviews
Singapore Airlines
8.2
Very Good
1,471 reviews
Check prices

Crew

8.6

Entertainment

8.0

Overall

8.2

Food

7.8

Boarding

8.3

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Wee Keng,Dec 2025

HKG - SIN

Quick 3 hour flight with excellent service from the crew despite it being Christmas Day holiday. Ground crew passed out Xmas cookies as well. Great experience.
Etihad Airways
7.3
Good
1,424 reviews
Singapore Airlines
8.2
Very Good
1,471 reviews
Check prices

Crew

8.6

Entertainment

8.0

Overall

8.2

Food

7.8

Boarding

8.3

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Wee Keng,Dec 2025

HKG - SIN

Quick 3 hour flight with excellent service from the crew despite it being Christmas Day holiday. Ground crew passed out Xmas cookies as well. Great experience.
Air China
7.3
Good
141 reviews
Singapore Airlines
8.2
Very Good
1,471 reviews
Check prices

Crew

8.6

Entertainment

8.0

Overall

8.2

Food

7.8

Boarding

8.3

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Wee Keng,Dec 2025

HKG - SIN

Quick 3 hour flight with excellent service from the crew despite it being Christmas Day holiday. Ground crew passed out Xmas cookies as well. Great experience.

Related info for your journey

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

    Vietnam Airlines and Singapore Airlines can get you from London Heathrow Airport to Cambodia in just under 16h 15m. Your travel time can differ by up to 05m. The distance from London Heathrow Airport to Cambodia is about 6106 mi. This flight may include one or multiple stops.

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

    One-way options have recently been found by users for as low as £289 on China Southern. Other airlines that offer cheap prices include Singapore Airlines from £313 and Etihad Airways from £331 one-way.

  • What are the most popular routes from London Heathrow Airport to Cambodia?

    Most travelers choose London Heathrow - Siem Reap–Angkor Intl, London Heathrow - Krong Preah Sihanouk Sihanoukville or London Heathrow - Phnom Penh Pochentong when deciding on the best route from London Heathrow Airport to Cambodia.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Heathrow to Cambodia 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 London Heathrow Airport to Cambodia?

    Currently, November is the cheapest month in which you can book a flight from London Heathrow Airport to Cambodia (average of £371). Flying from London Heathrow Airport to Cambodia in July is currently the most expensive (average of £694). 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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Heathrow to Cambodia

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from Heathrow to Cambodia

Discover the top 10 airlines that operate flights from Heathrow to Cambodia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 9 March 2026.
AirlineCheapestAverageFlexibilityOn-time
Air ChinaCheapest£268Average£441FlexibilityNo cancel feeOn-time67%
Search Air China flights
China SouthernCheapest£395Average£539FlexibilityNo cancel feeOn-time69%
Search China Southern flights
Shenzhen AirlinesCheapest£419Average£480FlexibilityNo cancel feeOn-time63%
Search Shenzhen Airlines flights
Etihad AirwaysCheapest£516Average£615FlexibilityNo cancel feeOn-time75%
Search Etihad Airways flights
Austrian AirlinesCheapest£540Average£691FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
China EasternCheapest£550Average£612FlexibilityNo cancel feeOn-time62%
Search China Eastern flights
Singapore AirlinesCheapest£585Average£751FlexibilityNo cancel feeOn-time81%
Search Singapore Airlines flights
Malaysia AirlinesCheapest£589Average£721FlexibilityNo cancel feeOn-time67%
Search Malaysia Airlines flights
LufthansaCheapest£599Average£770FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Vietnam AirlinesCheapest£618Average£737FlexibilityNo cancel feeOn-time81%
Search Vietnam Airlines 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 Cambodia?

Deals for Heathrow to Cambodia flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Heathrow to Cambodia for you. Better yet — we are completely free to use.

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

Need flexible booking options for your flight to Cambodia from Heathrow? 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 Heathrow to Cambodia become cheaper?

Of course! You can now track prices for flights from Heathrow to Cambodia and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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