Heathrow

$333+ 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 6/25. Fares are subject to change and may not be available on all flights or dates of travel.
PNH — LHR
Jun 17 — Jun 241
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Cheapflights Tip: The best prices from Phnom Penh Pochentong to London Heathrow are usually found in October or March, booked 42 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 June 12, 2025.

Round-trip from

$780
(China Southern)

One-way from

$333
(Mytrip)

Popular in

July

Cheapest in

October

Average price

$934
From Phnom Penh Pochentong to London Heathrow
One-way flight from Phnom Penh Pochentong to London Heathrow
Highest demand for flights based on searches. 10% potential increase in price ($118 potential increase over avg. RT price).
Cheapest flight prices on average. 4% potential price decrease ($41 potential savings vs. average RT price).
Average for round-trip flights in June 2025

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 June 12, 2025.

This China Southern deal was found by Cheapflights users on 6/10. 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.
Mon 8/43:35 pmPNH - LHR
1 stop33h 25mChina Southern
Mon 9/810:10 pmLHR - PNH
1 stop20h 00mChina Southern
Deal found 6/10$780
This FlightHub deal was found by Cheapflights users on 6/10. 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 6/2812:20 amPNH - LHR
1 stop26h 10mMultiple Airlines
Sun 7/138:25 pmLHR - PNH
2 stops32h 45mMultiple Airlines
Deal found 6/10$802
This FlightHub deal was found by Cheapflights users on 6/10. 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.
Thu 7/3112:10 amPNH - LHR
1 stop24h 30mChina Eastern
Sun 9/79:20 pmLHR - PNH
1 stop19h 55mChina Eastern
Deal found 6/10$816
This Air China deal was found by Cheapflights users on 6/10. 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 Air China is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/2912:15 pmPNH - LHR
2 stops38h 15mAir China
Sun 7/138:25 pmLHR - PNH
2 stops32h 45mAir China
Deal found 6/10$831
This SmartFares deal was found by Cheapflights users on 6/11. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/912:15 pmPNH - LHR
1 stop37h 45mShenzhen Airlines
Sun 11/99:10 pmLHR - PNH
1 stop31h 05mShenzhen Airlines
Deal found 6/11$938
This Emirates deal was found by Cheapflights users on 6/12. 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.
Wed 7/98:50 pmPNH - LHR
2 stops29h 25mEmirates
Thu 8/214:50 pmLHR - PNH
2 stops41h 45mEmirates
Deal found 6/12$979
This FlightHub deal was found by Cheapflights users on 6/10. 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.
Wed 7/95:40 pmPNH - LHR
2 stops18h 45mQatar Airways
Thu 8/213:05 pmLHR - PNH
2 stops19h 10mQatar Airways
Deal found 6/10$991
This FlightHub deal was found by Cheapflights users on 6/10. 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.
Sun 6/2911:55 pmPNH - LHR
1 stop24h 55mAsiana Airlines
Sun 7/138:40 pmLHR - PNH
1 stop20h 15mAsiana Airlines
Deal found 6/10$1,022
This Finnair deal was found by Cheapflights users on 6/12. 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 8/307:25 pmPNH - LHR
2 stops31h 15mFinnair
Fri 9/56:10 pmLHR - PNH
2 stops38h 15mFinnair
Deal found 6/12$1,044
This Singapore Airlines deal was found by Cheapflights users on 6/10. 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 Singapore Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/96:55 pmPNH - LHR
1 stop26h 50mSingapore Airlines
Thu 8/218:35 pmLHR - PNH
1 stop30h 05mSingapore Airlines
Deal found 6/10$1,162
This Cathay Pacific deal was found by Cheapflights users on 6/10. 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.
Wed 8/206:30 pmPNH - LHR
1 stop26h 45mCathay Pacific
Sat 9/136:20 pmLHR - PNH
1 stop17h 00mCathay Pacific
Deal found 6/10$1,164
This Malaysia Airlines deal was found by Cheapflights users on 6/10. 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.
Sun 8/1711:10 amPNH - LHR
1 stop35h 25mMalaysia Airlines
Thu 9/1811:00 amLHR - PNH
1 stop24h 25mMalaysia Airlines
Deal found 6/10$1,184

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 June 12, 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

Mon 8/4

3:35 pm-7:00 pm

1 stop33h 25m

London Heathrow

Mon 9/8

10:10 pm-12:10 am

1 stop20h 00m

$780

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Sat 6/28

12:20 am-8:30 pm

1 stop26h 10m

London Heathrow

Sun 7/13

8:25 pm-11:10 am

2 stops32h 45m

$802

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Thu 7/31

12:10 am-6:40 pm

1 stop24h 30m

London Heathrow

Sun 9/7

9:20 pm-11:15 pm

1 stop19h 55m

$816

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Sun 6/29

12:15 pm-8:30 pm

2 stops38h 15m

London Heathrow

Sun 7/13

8:25 pm-11:10 am

2 stops32h 45m

$831

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Tue 9/9

12:15 pm-8:00 pm

1 stop37h 45m

London Heathrow

Sun 11/9

9:10 pm-11:15 am

1 stop31h 05m

$938

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Wed 7/9

8:50 pm-8:15 pm

2 stops29h 25m

London Heathrow

Thu 8/21

4:50 pm-4:35 pm

2 stops41h 45m

$979

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Wed 7/9

5:40 pm-6:25 am

2 stops18h 45m

London Heathrow

Thu 8/21

3:05 pm-4:15 pm

2 stops19h 10m

$991

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Sun 6/29

11:55 pm-6:50 pm

1 stop24h 55m

London Heathrow

Sun 7/13

8:40 pm-10:55 pm

1 stop20h 15m

$1,022

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Sat 8/30

7:25 pm-8:40 pm

2 stops31h 15m

London Heathrow

Fri 9/5

6:10 pm-2:25 pm

2 stops38h 15m

$1,044

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Wed 7/9

6:55 pm-3:45 pm

1 stop26h 50m

London Heathrow

Thu 8/21

8:35 pm-8:40 am

1 stop30h 05m

$1,162

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 27 results
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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 June 9, 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 42 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 $1,108). 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 June 12, 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 June 12, 2025.

Food

7.8

Overall

8.3

Comfort

8.0

Entertainment

8.0

Boarding

8.3

Crew

8.5

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2025

YVR - TPE

I like the system, but the problem is the food , thre is no option, as a chef i don't recommend the food is worst we keep our hungry until taipe from vancouver

Food

7.8

Overall

8.3

Comfort

8.0

Entertainment

8.0

Boarding

8.3

Crew

8.5

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2025

YVR - TPE

I like the system, but the problem is the food , thre is no option, as a chef i don't recommend the food is worst we keep our hungry until taipe from vancouver

Food

7.8

Overall

8.3

Comfort

8.0

Entertainment

8.0

Boarding

8.3

Crew

8.5

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2025

YVR - TPE

I like the system, but the problem is the food , thre is no option, as a chef i don't recommend the food is worst we keep our hungry until taipe from vancouver

Food

7.8

Overall

8.3

Comfort

8.0

Entertainment

8.0

Boarding

8.3

Crew

8.5

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2025

YVR - TPE

I like the system, but the problem is the food , thre is no option, as a chef i don't recommend the food is worst we keep our hungry until taipe from vancouver

Food

7.8

Overall

8.3

Comfort

8.0

Entertainment

8.0

Boarding

8.3

Crew

8.5

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2025

YVR - TPE

I like the system, but the problem is the food , thre is no option, as a chef i don't recommend the food is worst we keep our hungry until taipe from vancouver

Food

7.8

Overall

8.3

Comfort

8.0

Entertainment

8.0

Boarding

8.3

Crew

8.5

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2025

YVR - TPE

I like the system, but the problem is the food , thre is no option, as a chef i don't recommend the food is worst we keep our hungry until taipe from vancouver

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 8 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 $780. Other airlines that can offer you cheap pricing are China Eastern, from $816, and Air China, from $831. These flights start at 25% 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 China Southern, with whom users have recently found tickets for as low as $333. However, be on the lookout for offers from Air China and China Eastern, 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 $1,108). 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
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Luton
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Gatwick
Orpington
Watford
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Broadway
Sutton
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Top 8 airlines flying from Phnom Penh to Heathrow

Discover the top 8 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
China EasternCheapest$633Average$863FlexibilityNo cancel feeOn-time62%
China SouthernCheapest$638Average$753FlexibilityNo cancel feeOn-time69%
Air ChinaCheapest$706Average$930FlexibilityNo cancel feeOn-time67%
Malaysia AirlinesCheapest$865Average$1,397FlexibilityNo cancel feeOn-time67%
Singapore AirlinesCheapest$921Average$1,273FlexibilityNo cancel feeOn-time81%
British AirwaysCheapest$958Average$1,591FlexibilityNo cancel feeOn-time70%
Qatar AirwaysCheapest$968Average$1,562FlexibilityNo cancel feeOn-time68%
Thai AirwaysCheapest$1,103Average$1,299FlexibilityNo cancel feeOn-time77%

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