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Phnom Penh

$428+ Cheap flights from Heathrow (LHR) to Phnom Penh (PNH)

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 4/21. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — PNH
Apr 2 — Apr 91
Wed 4/2
Wed 4/9
1 adult, Economy
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Cheapflights Tip: The best prices from London Heathrow to Phnom Penh Pochentong are usually found in May or March, booked 67 days in advance, depart on a Friday or Thursday and return on a Sunday

Cheap flight deals from Heathrow to Phnom Penh

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Phnom Penh (PNH). 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 March 28, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$650
(China Southern)

One-way from

$428
(Shenzhen Airlines)

Popular in

August

Cheapest in

May

Average price

$782
Provider with most accurate pricing for London Heathrow-Phnom Penh Pochentong flight deals.
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Provider most trusted by Cheapflights users for London Heathrow-Phnom Penh Pochentong flights.
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From London Heathrow to Phnom Penh Pochentong
Search Deals
One-way flight from London Heathrow to Phnom Penh Pochentong
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($178 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($34 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Find flight deals from Heathrow to Phnom Penh

Cheapest flights from Heathrow to Phnom Penh
Explore the most affordable flight options available from Heathrow to Phnom Penh. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 28, 2025.

This China Southern deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure China Southern is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/1110:10 pmLHR - PNH
1 stop20h 00mChina Southern
Sun 5/188:00 amPNH - LHR
2 stops40h 05mChina Southern
Deal found 3/27$650
This oojo deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/710:05 pmLHR - PNH
1 stop31h 05mShenzhen Airlines
Sun 6/2212:15 pmPNH - LHR
1 stop37h 35mShenzhen Airlines
Deal found 3/27$657
This Mytrip deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/112:40 pmLHR - PNH
2 stops21h 35mMultiple Airlines
Sun 5/1811:05 amPNH - LHR
3 stops31h 35mMultiple Airlines
Deal found 3/27$729
This Booking.com deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/119:20 pmLHR - PNH
2 stops32h 15mChina Eastern
Sat 5/1712:10 amPNH - LHR
1 stop24h 30mChina Eastern
Deal found 3/27$796
This Etihad Airways deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Etihad Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/21:55 pmLHR - PNH
1 stop34h 25mEtihad Airways
Tue 11/188:40 amPNH - LHR
1 stop16h 45mEtihad Airways
Deal found 3/27$797
This China Airlines deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure China Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/279:15 pmLHR - PNH
1 stop30h 20mChina Airlines
Fri 11/1411:35 amPNH - LHR
1 stop36h 20mChina Airlines
Deal found 3/27$925
This Malaysia Airlines deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Malaysia Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2710:25 amLHR - PNH
1 stop24h 05mMalaysia Airlines
Tue 11/186:30 pmPNH - LHR
1 stop27h 55mMalaysia Airlines
Deal found 3/27$945
This Emirates deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Emirates is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/289:10 amLHR - PNH
2 stops24h 25mEmirates
Wed 11/128:35 pmPNH - LHR
2 stops30h 25mEmirates
Deal found 3/27$1,003
This Vietnam Airlines deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Vietnam Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/297:05 pmLHR - PNH
3 stops34h 55mVietnam Airlines
Tue 7/17:05 amPNH - LHR
1 stop16h 45mVietnam Airlines
Deal found 3/27$1,160
This Qatar Airways deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/303:05 pmLHR - PNH
2 stops19h 10mQatar Airways
Fri 6/275:40 pmPNH - LHR
2 stops20h 20mQatar Airways
Deal found 3/27$1,166
This British Airways deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/303:35 pmLHR - PNH
2 stops18h 40mBritish Airways
Mon 6/306:20 pmPNH - LHR
1 stop17h 05mBritish Airways
Deal found 3/27$1,189
This Cathay Pacific deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/16:20 pmLHR - PNH
1 stop17h 00mCathay Pacific
Sun 6/296:30 pmPNH - LHR
1 stop17h 50mCathay Pacific
Deal found 3/27$1,207

Cheapflights Fare Finder

Customize your flight search to find flights from Heathrow to Phnom Penh 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 2,558,603 searches. Data last updated March 28, 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Phnom Penh that are best for you.

Fly from

Heathrow

Fly to

Phnom Penh

Route

Depart

Return

Price

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Sun 5/11

10:10 pm-12:10 am

1 stop20h 00m

Phnom Penh Pochentong

Sun 5/18

8:00 am-6:05 pm

2 stops40h 05m

$650

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Sat 6/7

10:05 pm-11:10 am

1 stop31h 05m

Phnom Penh Pochentong

Sun 6/22

12:15 pm-7:50 pm

1 stop37h 35m

$657

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Sun 5/11

2:40 pm-6:15 pm

2 stops21h 35m

Phnom Penh Pochentong

Sun 5/18

11:05 am-12:40 pm

3 stops31h 35m

$729

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Sun 5/11

9:20 pm-11:35 am

2 stops32h 15m

Phnom Penh Pochentong

Sat 5/17

12:10 am-6:40 pm

1 stop24h 30m

$796

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Tue 7/29

4:50 pm-4:35 pm

2 stops41h 45m

Phnom Penh Pochentong

Wed 8/13

8:50 pm-12:25 pm

2 stops21h 35m

$1,314

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Tue 4/22

6:00 am-2:25 pm

2 stops26h 25m

Phnom Penh Pochentong

Fri 4/25

6:55 pm-4:25 pm

2 stops27h 30m

$1,453

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Mon 7/28

2:45 pm-8:35 am

2 stops35h 50m

Phnom Penh Pochentong

Thu 8/14

7:25 pm-6:45 pm

2 stops29h 20m

$1,493

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Mon 5/12

6:55 pm-1:00 pm

2 stops36h 05m

Phnom Penh Pochentong

Wed 5/28

5:45 pm-10:30 am

3 stops22h 45m

$1,540

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Fri 8/1

8:10 pm-5:20 pm

1 stop39h 10m

Phnom Penh Pochentong

Wed 8/13

6:30 pm-6:20 am

1 stop17h 50m

$1,679

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Wed 7/30

8:35 pm-5:40 pm

1 stop39h 05m

Phnom Penh Pochentong

Mon 8/18

9:35 am-3:45 pm

1 stop36h 10m

$1,681

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

Showing 1-10 of 20 results
1
2

Compare providers for flights from Heathrow to Phnom Penh

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Heathrow to Phnom Penh in March.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
Justfly.comPrice Accuracy3 starsTrust Score*3 stars
oojoPrice Accuracy3 starsTrust Score*2 stars
GotogatePrice Accuracy3 starsTrust Score*3 stars
FlightnetworkPrice Accuracy2 starsTrust Score*3 stars
business-class.comPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on London Heathrow Airport-Phnom Penh flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on London Heathrow Airport-Phnom Penh flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from London Heathrow Airport-Phnom Penh flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on London Heathrow Airport-Phnom Penh flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for London Heathrow Airport-Phnom Penh flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Heathrow to Phnom Penh

Have a flexible travel schedule? Discover the best time to fly to Phnom Penh from Heathrow with our price prediction graph.
Estimated round-trip 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 Phnom Penh

How far ahead should I book a flight from London Heathrow Airport to Phnom Penh?

Use this chart to determine the optimal time to book a round-trip flight from Heathrow to Phnom Penh. Price data was last updated on March 21, 2025.

The best time to book flights from London Heathrow Airport to Phnom Penh is 67 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, March is the cheapest month in which you can book a flight from London Heathrow Airport to Phnom Penh (average of $995). Flying from London Heathrow Airport to Phnom Penh in June is currently the most expensive (average of $1,582). 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.

What is the cheapest time of day to fly from LHR to PNH?

Find hourly flight availability from Heathrow to Phnom Penh. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 28, 2025.

When flying from London Heathrow Airport to Phnom Penh, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 31% versus a flight at noon.

Rainfall in Phnom Penh by month

Plan your trip to Phnom Penh by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Phnom Penh ranges from 0.0 - 9.8 inches per month. October is typically the wettest month, when rainfall can reach 9.8 in. January is typically the driest time to visit Phnom Penh when rainfall is around 0.0 in.

Temperature in Phnom Penh by month

Plan your trip to Phnom Penh by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Phnom Penh, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 77.0 F).

Reviews of airlines servicing Phnom Penh

Get insights into the airlines that provide service to Phnom Penh. 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 Phnom Penh. Reviews last updated March 28, 2025.
See what other customers who have flown with Korean Air, Singapore Airlines and Emirates from London to Phnom Penh have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,050 reviews

Entertainment

8.2

Comfort

8.3

Overall

8.4

Boarding

8.5

Food

8.1

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Korean Air
8.4
Very good
1,050 reviews
Korean Air
8.4
Very good
1,050 reviews

Entertainment

8.2

Comfort

8.3

Overall

8.4

Boarding

8.5

Food

8.1

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Singapore Airlines
8.1
Very good
1,285 reviews
Korean Air
8.4
Very good
1,050 reviews

Entertainment

8.2

Comfort

8.3

Overall

8.4

Boarding

8.5

Food

8.1

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Emirates
8.0
Very good
3,190 reviews
Korean Air
8.4
Very good
1,050 reviews

Entertainment

8.2

Comfort

8.3

Overall

8.4

Boarding

8.5

Food

8.1

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Vietnam Airlines
7.6
Good
192 reviews
Korean Air
8.4
Very good
1,050 reviews

Entertainment

8.2

Comfort

8.3

Overall

8.4

Boarding

8.5

Food

8.1

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Finnair
7.6
Good
1,267 reviews
Korean Air
8.4
Very good
1,050 reviews

Entertainment

8.2

Comfort

8.3

Overall

8.4

Boarding

8.5

Food

8.1

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Phnom Penh. 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 Phnom Penh from London Heathrow?

    If you book a flight to Phnom Penh from London Heathrow, you will be flying to Pochentong, which is the city’s only airport. Phnom Penh Pochentong (PNH) is located 5.0 mi from the center of Phnom Penh. There are 0 flights from London Heathrow to Pochentong per day from 4 different airlines.

  • What are the cheapest airlines flying from London Heathrow Airport to Phnom Penh round-trip?

    According to our current data, China Southern ($650), Shenzhen Airlines ($657), and China Eastern ($796) offers the cheapest pricing from London Heathrow Airport to Phnom Penh. Users have found that China Southern is 31% cheaper than the other options available to this destination.

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

    $428 is the cheapest one-way deal found within the past few days, from Shenzhen Airlines. You may also be able to find cheap deals on Emirates and Cathay Pacific, with prices starting from $721 and $779, respectively.

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

    Yes. In addition to deals on Heathrow to Phnom Penh flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Heathrow to Phnom Penh?

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

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

    Yes. Cheapflights offers flight deals from Heathrow to Phnom Penh 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 Phnom Penh?

    Currently, March is the cheapest month in which you can book a flight from London Heathrow Airport to Phnom Penh (average of $995). Flying from London Heathrow Airport to Phnom Penh in June is currently the most expensive (average of $1,582). 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

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Complete your trip

Complete your trip to Phnom Penh by adding a car rental and/or hotel reservation to your travel itinerary.
Phnom Penh car rentals
Phnom Penh Pochentong Airport car rentals

Top 4 airlines flying from Heathrow to Phnom Penh

Discover the top 4 airlines that operate flights from Heathrow to Phnom Penh. 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 2,558,603 searches. Data last updated March 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
China SouthernCheapest$571Average$717FlexibilityNo cancel feeOn-time69%
Air ChinaCheapest$641Average$1,165FlexibilityNo cancel feeOn-time67%
Singapore AirlinesCheapest$776Average$1,062FlexibilityNo cancel feeOn-time81%
Thai AirwaysCheapest$1,031Average$1,165FlexibilityNo cancel feeOn-time77%
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