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$412+ Cheap flights from Phnom Penh (PNH) to Heathrow (LHR)

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 7/13. Fares are subject to change and may not be available on all flights or dates of travel.
PNH — LHR
May 5 — May 121
Mon 5/5
Mon 5/12
1 adult, Economy
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1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

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3. Compare prices and book

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Cheapflights Tip: The best prices from Phnom Penh Pochentong to London Heathrow are usually found in October or March, booked 21 days in advance, depart on a Sunday or Saturday and return on a Friday

Cheap flight deals from Phnom Penh to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Phnom Penh (PNH) to Heathrow (LHR). 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 April 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$648
(Gotogate)

One-way from

$412
(CheapOair)

Popular in

July

Cheapest in

October

Average price

$1,183
Provider with most accurate pricing for Phnom Penh Pochentong-London Heathrow flight deals.
Search Deals
Provider most trusted by Cheapflights users for Phnom Penh Pochentong-London Heathrow flights.
Search Deals
From Phnom Penh Pochentong to London Heathrow
Search Deals
One-way flight from Phnom Penh Pochentong to London Heathrow
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($127 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($43 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
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Find flight deals from Phnom Penh to Heathrow

Cheapest flights from Phnom Penh to Heathrow
Explore the most affordable flight options available from Phnom Penh to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 30, 2025.

This Gotogate deal was found by Cheapflights users on 4/29. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2212:40 pmPNH - LHR
2 stops36h 00mChina Eastern
Mon 5/269:20 pmLHR - PNH
3 stops32h 15mChina Eastern
Deal found 4/29$648
This Gotogate deal was found by Cheapflights users on 4/29. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/228:00 amPNH - LHR
1 stop17h 00mChina Southern
Mon 5/269:00 pmLHR - PNH
2 stops21h 10mChina Southern
Deal found 4/29$679
This oojo deal was found by Cheapflights users on 4/29. 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 5/1712:15 pmPNH - LHR
1 stop37h 45mShenzhen Airlines
Sat 6/710:05 pmLHR - PNH
1 stop31h 05mShenzhen Airlines
Deal found 4/29$707
This Finnair deal was found by Cheapflights users on 4/29. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/177:25 pmPNH - LHR
2 stops31h 15mFinnair
Sat 6/710:20 amLHR - PNH
2 stops40h 15mFinnair
Deal found 4/29$1,002
This Emirates deal was found by Cheapflights users on 4/29. 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.
Fri 8/18:50 pmPNH - LHR
2 stops25h 20mEmirates
Sun 9/78:40 pmLHR - PNH
2 stops37h 55mEmirates
Deal found 4/29$1,013
This Booking.com deal was found by Cheapflights users on 4/29. 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.
Thu 9/189:40 amPNH - LHR
1 stop15h 30mMultiple Airlines
Thu 9/1810:10 pmLHR - PNH
1 stop20h 00mMultiple Airlines
Deal found 4/29$1,033
This British Airways deal was found by Cheapflights users on 4/29. 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.
Fri 8/16:20 pmPNH - LHR
1 stop17h 05mBritish Airways
Sun 9/74:00 pmLHR - PNH
2 stops18h 15mBritish Airways
Deal found 4/29$1,091
This China Airlines deal was found by Cheapflights users on 4/29. 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 5/55:10 pmPNH - LHR
1 stop29h 20mChina Airlines
Mon 5/199:10 pmLHR - PNH
1 stop30h 40mChina Airlines
Deal found 4/29$1,189
This FlightHub deal was found by Cheapflights users on 4/29. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/55:40 pmPNH - LHR
2 stops26h 30mQatar Airways
Sat 7/267:25 pmLHR - PNH
2 stops38h 50mQatar Airways
Deal found 4/29$1,220
This Vietnam Airlines deal was found by Cheapflights users on 4/29. 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 6/145:45 pmPNH - LHR
2 stops30h 05mVietnam Airlines
Thu 7/109:00 amLHR - PNH
3 stops22h 00mVietnam Airlines
Deal found 4/29$1,564
This Malaysia Airlines deal was found by Cheapflights users on 4/29. 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.
Thu 5/2211:10 amPNH - LHR
1 stop35h 25mMalaysia Airlines
Mon 5/2611:00 amLHR - PNH
1 stop17h 00mMalaysia Airlines
Deal found 4/29$8,167

Cheapflights Fare Finder

Customize your flight search to find flights from Phnom Penh 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 2,558,603 searches. Data last updated April 30, 2025.
Use the filters below to find and compare flights from Phnom Penh to London Heathrow Airport that are best for you.

Fly from

Phnom Penh

Fly to

Heathrow

Route

Depart

Return

Price

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Thu 5/22

12:40 pm-6:40 pm

2 stops36h 00m

London Heathrow

Mon 5/26

9:20 pm-11:35 am

3 stops32h 15m

$648

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Thu 5/22

8:00 am-7:00 pm

1 stop17h 00m

London Heathrow

Mon 5/26

9:00 pm-12:10 am

2 stops21h 10m

$679

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Sat 5/17

12:15 pm-8:00 pm

1 stop37h 45m

London Heathrow

Sat 6/7

10:05 pm-11:10 am

1 stop31h 05m

$707

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Sat 5/17

7:25 pm-8:40 pm

2 stops31h 15m

London Heathrow

Sat 6/7

10:20 am-8:35 am

2 stops40h 15m

$1,002

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Fri 8/1

8:50 pm-4:10 pm

2 stops25h 20m

London Heathrow

Sun 9/7

8:40 pm-4:35 pm

2 stops37h 55m

$1,013

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Thu 9/18

9:40 am-7:10 pm

1 stop15h 30m

London Heathrow

Thu 9/18

10:10 pm-12:10 am

1 stop20h 00m

$1,033

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Fri 8/1

6:20 pm-5:25 am

1 stop17h 05m

London Heathrow

Sun 9/7

4:00 pm-4:15 pm

2 stops18h 15m

$1,091

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Sat 7/5

5:40 pm-2:10 pm

2 stops26h 30m

London Heathrow

Sat 7/26

7:25 pm-4:15 pm

2 stops38h 50m

$1,220

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Sat 6/14

5:45 pm-5:50 pm

2 stops30h 05m

London Heathrow

Thu 7/10

9:00 am-1:00 pm

3 stops22h 00m

$1,564

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Thu 5/22

11:10 am-4:35 pm

1 stop35h 25m

London Heathrow

Mon 5/26

11:00 am-10:00 am

1 stop17h 00m

$8,167

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 19 results
1
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Compare providers for flights from Phnom Penh to Heathrow

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 Phnom Penh to Heathrow in April.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
GotogatePrice Accuracy3 starsTrust Score*2 stars
Trip.comPrice Accuracy1 starTrust Score*3 stars
CheapTicketsDealPrice 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 Phnom Penh-London Heathrow Airport flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Phnom Penh-London Heathrow Airport flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Phnom Penh-London Heathrow Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Phnom Penh-London Heathrow Airport flights, Cheapflights users trust eDreams the most. eDreams 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 Phnom Penh-London Heathrow Airport 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 Phnom Penh to Heathrow

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

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

Use this chart to determine the optimal time to book a round-trip flight from Phnom Penh to Heathrow. Price data was last updated on April 25, 2025.

To ensure you get the cheapest price possible for a flight from Phnom Penh to London Heathrow Airport, you should look to book at least 21 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, November is the cheapest month in which you can book a flight from Phnom Penh to London Heathrow Airport (average of $661). Flying from Phnom Penh to London Heathrow Airport in June is currently the most expensive (average of $1,110). 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 PNH to LHR?

Find hourly flight availability from Phnom Penh to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 30, 2025.

It’s typically best to fly out from Phnom Penh to London Heathrow Airport in the morning. Doing so could potentially save you 27% on the flight price compared to flying at noon, which is usually more expensive.

Rainfall in Heathrow by month

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

In terms of precipitation, rainfall in London Heathrow Airport ranges from 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit London Heathrow Airport when rainfall is around 1.6 in.

Temperature in Heathrow by month

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

If weather is an important factor for your trip to London Heathrow Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated April 30, 2025.
Emirates
8.0
Very good
3,215 reviews

Food

7.8

Entertainment

8.2

Boarding

8.1

Comfort

8.0

Crew

8.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Steven,Feb 2025

GLA - DXB

Although I was in economy it made no difference where the staff were concerned they were attentive and pleasant throughout the flight maybe one day I'll get the chance to see if there's a difference in business or 1st class service but in truth for the way I was treated I can only see the menu being an upgrade as the staff don't need upgrading and are indeed the biggest asset on a long journey a credit to the company.
Emirates
8.0
Very good
3,215 reviews
Emirates
8.0
Very good
3,215 reviews

Food

7.8

Entertainment

8.2

Boarding

8.1

Comfort

8.0

Crew

8.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Steven,Feb 2025

GLA - DXB

Although I was in economy it made no difference where the staff were concerned they were attentive and pleasant throughout the flight maybe one day I'll get the chance to see if there's a difference in business or 1st class service but in truth for the way I was treated I can only see the menu being an upgrade as the staff don't need upgrading and are indeed the biggest asset on a long journey a credit to the company.
Thai Airways
7.7
Good
325 reviews
Emirates
8.0
Very good
3,215 reviews

Food

7.8

Entertainment

8.2

Boarding

8.1

Comfort

8.0

Crew

8.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Steven,Feb 2025

GLA - DXB

Although I was in economy it made no difference where the staff were concerned they were attentive and pleasant throughout the flight maybe one day I'll get the chance to see if there's a difference in business or 1st class service but in truth for the way I was treated I can only see the menu being an upgrade as the staff don't need upgrading and are indeed the biggest asset on a long journey a credit to the company.
Finnair
7.6
Good
1,273 reviews
Emirates
8.0
Very good
3,215 reviews

Food

7.8

Entertainment

8.2

Boarding

8.1

Comfort

8.0

Crew

8.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Steven,Feb 2025

GLA - DXB

Although I was in economy it made no difference where the staff were concerned they were attentive and pleasant throughout the flight maybe one day I'll get the chance to see if there's a difference in business or 1st class service but in truth for the way I was treated I can only see the menu being an upgrade as the staff don't need upgrading and are indeed the biggest asset on a long journey a credit to the company.
Vietnam Airlines
7.6
Good
196 reviews
Emirates
8.0
Very good
3,215 reviews

Food

7.8

Entertainment

8.2

Boarding

8.1

Comfort

8.0

Crew

8.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Steven,Feb 2025

GLA - DXB

Although I was in economy it made no difference where the staff were concerned they were attentive and pleasant throughout the flight maybe one day I'll get the chance to see if there's a difference in business or 1st class service but in truth for the way I was treated I can only see the menu being an upgrade as the staff don't need upgrading and are indeed the biggest asset on a long journey a credit to the company.
China Southern
7.5
Good
96 reviews
Emirates
8.0
Very good
3,215 reviews

Food

7.8

Entertainment

8.2

Boarding

8.1

Comfort

8.0

Crew

8.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Steven,Feb 2025

GLA - DXB

Although I was in economy it made no difference where the staff were concerned they were attentive and pleasant throughout the flight maybe one day I'll get the chance to see if there's a difference in business or 1st class service but in truth for the way I was treated I can only see the menu being an upgrade as the staff don't need upgrading and are indeed the biggest asset on a long journey a credit to the company.

Related info for your journey

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

    Most people fly from Phnom Penh Pochentong (PNH) if they book a flight from Phnom Penh to London Heathrow. On average, Pochentong has 0 outbound flights to London Heathrow per day from 9 airlines. Phnom Penh Pochentong is conveniently located just 5.0 mi from Phnom Penh’s city center.

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

    Cheapflights users have booked flights from Phnom Penh to London Heathrow Airport round-trip from $648. Other airlines that can offer you cheap pricing are China Southern, from $679, and Shenzhen Airlines, from $707. These flights start at 37% lower than the current average price 3 months from now.

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

    The cheapest airline one-way is XiamenAir, with whom users have recently found tickets for as low as $412. However, be on the lookout for offers from Malaysia Airlines and Thai Airways, as they are both options that can get you from Phnom Penh to London Heathrow Airport for a low price.

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

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

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

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

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

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

    Currently, November is the cheapest month in which you can book a flight from Phnom Penh to London Heathrow Airport (average of $661). Flying from Phnom Penh to London Heathrow Airport in June is currently the most expensive (average of $1,110). 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

Traveling to a place near Phnom Penh?

Book flights to Phnom Penh if you plan to visit one of these locations
Hayes
Hounslow
Thornton Heath
Luton
Horley
Canterbury
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Wembley
Dover
Stratford-upon-Avon
Gatwick
Orpington
Watford
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Croydon
Borehamwood
Folkestone
Ilford
Broadway
Aylesbury

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Top 9 airlines flying from Phnom Penh to Heathrow

Discover the top 9 airlines that operate flights from Phnom Penh to Heathrow. 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 April 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
China EasternCheapest$633Average$862FlexibilityNo cancel feeOn-time62%
China SouthernCheapest$663Average$757FlexibilityNo cancel feeOn-time69%
Air ChinaCheapest$706Average$858FlexibilityNo cancel feeOn-time67%
Singapore AirlinesCheapest$921Average$1,180FlexibilityNo cancel feeOn-time81%
EmiratesCheapest$929Average$1,035FlexibilityNo cancel feeOn-time75%
British AirwaysCheapest$958Average$1,591FlexibilityNo cancel feeOn-time70%
Qatar AirwaysCheapest$993Average$1,562FlexibilityNo cancel feeOn-time68%
Malaysia AirlinesCheapest$999Average$1,397FlexibilityNo cancel feeOn-time67%
Thai AirwaysCheapest$1,103Average$1,283FlexibilityNo cancel feeOn-time77%

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