HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Heathrow

$407+ 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 9/20. Fares are subject to change and may not be available on all flights or dates of travel.
PNH — LHR
ag. 4 — ag. 111
dl. 8/4
dl. 8/11
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Phnom Penh to Heathrow with Cheapflights

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

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Phnom Penh Pochentong to London Heathrow are usually found in March or October, 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 juliol 30, 2025.

Round-trip from

$738
(Booking.com)

One-way from

$407
(Trip.com)

Popular in

July

Cheapest in

March

Average price

$1,496
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. 7% potential increase in price ($89 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($41 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

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 juliol 30, 2025.

This Booking.com deal was found by Cheapflights users on 7/30. 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.
ds. 10/118:00 amPNH - LHR
1 stop17h 00mChina Southern
dj. 10/2310:10 pmLHR - PNH
1 stop30h 30mChina Southern
Deal found 7/30$738
This CheapOair deal was found by Cheapflights users on 7/29. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dl. 8/1812:40 pmPNH - LHR
2 stops36h 00mChina Eastern
dc. 9/179:20 pmLHR - PNH
1 stop19h 55mChina Eastern
Deal found 7/29$789
This Booking.com deal was found by Cheapflights users on 7/30. 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.
dj. 8/2112:20 amPNH - LHR
1 stop26h 10mAir China
dt. 9/210:40 pmLHR - PNH
2 stops30h 30mAir China
Deal found 7/30$806
This Mytrip deal was found by Cheapflights users on 7/30. 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.
ds. 10/113:35 pmPNH - LHR
1 stop33h 25mMultiple Airlines
dj. 10/2311:05 amLHR - PNH
3 stops26h 40mMultiple Airlines
Deal found 7/30$885
This Qatar Airways deal was found by Cheapflights users on 7/30. 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.
dv. 12/195:10 pmPNH - LHR
2 stops21h 10mQatar Airways
dv. 1/28:40 amLHR - PNH
2 stops23h 45mQatar Airways
Deal found 7/30$947
This British Airways deal was found by Cheapflights users on 7/29. 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.
dv. 12/195:10 pmPNH - LHR
2 stops26h 05mBritish Airways
dv. 1/28:05 amLHR - PNH
2 stops24h 20mBritish Airways
Deal found 7/29$997
This China Airlines deal was found by Cheapflights users on 7/30. 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.
dv. 8/2210:50 amPNH - LHR
1 stop35h 40mChina Airlines
dt. 9/29:10 pmLHR - PNH
1 stop36h 55mChina Airlines
Deal found 7/30$1,180
This Finnair deal was found by Cheapflights users on 7/30. 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.
dv. 8/227:40 pmPNH - LHR
2 stops32h 30mFinnair
dt. 9/27:30 amLHR - PNH
2 stops19h 05mFinnair
Deal found 7/30$1,294

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 juliol 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

ds. 10/11

8:00 am-7:00 pm

1 stop17h 00m

London Heathrow

dj. 10/23

10:10 pm-10:40 am

1 stop30h 30m

$738

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

dl. 8/18

12:40 pm-6:40 pm

2 stops36h 00m

London Heathrow

dc. 9/17

9:20 pm-11:15 pm

1 stop19h 55m

$789

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

dj. 8/21

12:20 am-8:30 pm

1 stop26h 10m

London Heathrow

dt. 9/2

10:40 pm-11:10 am

2 stops30h 30m

$806

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

ds. 10/11

3:35 pm-7:00 pm

1 stop33h 25m

London Heathrow

dj. 10/23

11:05 am-7:45 pm

3 stops26h 40m

$885

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

dv. 12/19

5:10 pm-7:20 am

2 stops21h 10m

London Heathrow

dv. 1/2

8:40 am-3:25 pm

2 stops23h 45m

$947

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

dv. 12/19

5:10 pm-12:15 pm

2 stops26h 05m

London Heathrow

dv. 1/2

8:05 am-3:25 pm

2 stops24h 20m

$997

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

dv. 8/22

10:50 am-4:30 pm

1 stop35h 40m

London Heathrow

dt. 9/2

9:10 pm-4:05 pm

1 stop36h 55m

$1,180

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

dv. 8/22

7:40 pm-10:10 pm

2 stops32h 30m

London Heathrow

dt. 9/2

7:30 am-8:35 am

2 stops19h 05m

$1,294

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

ds. 9/20

7:05 pm-2:45 pm

2 stops25h 40m

$407

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

dg. 9/7

8:50 pm-8:15 pm

2 stops53h 25m

$506

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

Showing 1-10 of 15 results
1
2

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 July 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 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 $1,097). 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 juliol 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.

How much does it cost to fly round-trip from Phnom Penh to London Heathrow Airport?

What’s the top layover airport for flights from Phnom Penh to London Heathrow Airport?

Share of 1-stop round-trip flights from Phnom Penh to London Heathrow Airport chosen by Cheapflights users in the past 12 months, using the same layover each way.

Singapore (SIN) – chosen by Cheapflights users on 83% of 1-stop itineraries from Phnom Penh to London Heathrow Airport on Cheapflights.

What’s the cheapest layover airport for flights from Phnom Penh to London Heathrow Airport?

Average round-trip fare for 1-stop flights from Phnom Penh to London Heathrow Airport, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Bangkok (BKK) is the most affordable 1-stop option, with an average round-trip price of $1,338.

What’s the fastest layover option from Phnom Penh to London Heathrow Airport?

Shortest average travel time for 1-stop one-way flights from Phnom Penh to London Heathrow Airport, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Bangkok (BKK) have the shortest average one-way travel time for 1-stop routes: 15h 30m.

Which airport typically offers the quickest layover for flights from Phnom Penh to London Heathrow Airport?

Average layover duration for 1-stop one-way flights from Phnom Penh to London Heathrow Airport, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Bangkok (BKK) offer the fastest connection on this route, with an average layover time of 1h 43m.

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 juliol 30, 2025.
Read through reviews of airlines operating flights from Phnom Penh to London Heathrow Airport, such as China Airlines, Emirates, and China Southern. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
China Airlines
8.3
Very good
754 reviews

Boarding

8.3

Overall

8.3

Food

7.8

Entertainment

8.0

Comfort

8.0

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jul 2025

SFO - TPE

Bad News - The flight was delayed and it was due to ground crew issues but the staff were moving things along. The seat size was cramp and i am a lean person. The attendant kept asking me in Chinese when i already stated i don’t speak the language. The food was bad. The taste, aroma, consistent of mush. Even a cafeteria lady can cook better food. Kudos - the pilot made up for lost time to the best of his ability. He made sure that the flight was smooth even though there was occasional turbulence. The landing was great.
China Airlines
8.3
Very good
754 reviews
China Airlines
8.3
Very good
754 reviews

Boarding

8.3

Overall

8.3

Food

7.8

Entertainment

8.0

Comfort

8.0

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jul 2025

SFO - TPE

Bad News - The flight was delayed and it was due to ground crew issues but the staff were moving things along. The seat size was cramp and i am a lean person. The attendant kept asking me in Chinese when i already stated i don’t speak the language. The food was bad. The taste, aroma, consistent of mush. Even a cafeteria lady can cook better food. Kudos - the pilot made up for lost time to the best of his ability. He made sure that the flight was smooth even though there was occasional turbulence. The landing was great.
Emirates
8.1
Very good
3,299 reviews
China Airlines
8.3
Very good
754 reviews

Boarding

8.3

Overall

8.3

Food

7.8

Entertainment

8.0

Comfort

8.0

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jul 2025

SFO - TPE

Bad News - The flight was delayed and it was due to ground crew issues but the staff were moving things along. The seat size was cramp and i am a lean person. The attendant kept asking me in Chinese when i already stated i don’t speak the language. The food was bad. The taste, aroma, consistent of mush. Even a cafeteria lady can cook better food. Kudos - the pilot made up for lost time to the best of his ability. He made sure that the flight was smooth even though there was occasional turbulence. The landing was great.
China Southern
7.6
Good
104 reviews
China Airlines
8.3
Very good
754 reviews

Boarding

8.3

Overall

8.3

Food

7.8

Entertainment

8.0

Comfort

8.0

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jul 2025

SFO - TPE

Bad News - The flight was delayed and it was due to ground crew issues but the staff were moving things along. The seat size was cramp and i am a lean person. The attendant kept asking me in Chinese when i already stated i don’t speak the language. The food was bad. The taste, aroma, consistent of mush. Even a cafeteria lady can cook better food. Kudos - the pilot made up for lost time to the best of his ability. He made sure that the flight was smooth even though there was occasional turbulence. The landing was great.
Finnair
7.6
Good
1,316 reviews
China Airlines
8.3
Very good
754 reviews

Boarding

8.3

Overall

8.3

Food

7.8

Entertainment

8.0

Comfort

8.0

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jul 2025

SFO - TPE

Bad News - The flight was delayed and it was due to ground crew issues but the staff were moving things along. The seat size was cramp and i am a lean person. The attendant kept asking me in Chinese when i already stated i don’t speak the language. The food was bad. The taste, aroma, consistent of mush. Even a cafeteria lady can cook better food. Kudos - the pilot made up for lost time to the best of his ability. He made sure that the flight was smooth even though there was occasional turbulence. The landing was great.
Qatar Airways
7.4
Good
3,607 reviews
China Airlines
8.3
Very good
754 reviews

Boarding

8.3

Overall

8.3

Food

7.8

Entertainment

8.0

Comfort

8.0

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jul 2025

SFO - TPE

Bad News - The flight was delayed and it was due to ground crew issues but the staff were moving things along. The seat size was cramp and i am a lean person. The attendant kept asking me in Chinese when i already stated i don’t speak the language. The food was bad. The taste, aroma, consistent of mush. Even a cafeteria lady can cook better food. Kudos - the pilot made up for lost time to the best of his ability. He made sure that the flight was smooth even though there was occasional turbulence. The landing was great.

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 7 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 $738. Other airlines that can offer you cheap pricing are China Eastern, from $789, and Air China, from $806. These flights start at 29% 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 Emirates, with whom users have recently found tickets for as low as $506. However, be on the lookout for offers from Cambodia Angkor Air and China Southern, 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 $1,097). 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 London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Hounslow
Hayes
Thornton Heath
Harrow
Canterbury
Dover
Stratford-upon-Avon
Orpington
Watford
Northampton
Gatwick
Borehamwood
Dartford
Broadway
Aylesbury
Chelmsford
Folkestone
Southend-on-Sea
Chichester
Swindon

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 7 airlines flying from Phnom Penh to Heathrow

Discover the top 7 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 juliol 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
China EasternCheapest$633Average$827FlexibilityNo cancel feeOn-time62%
China SouthernCheapest$664Average$751FlexibilityNo cancel feeOn-time69%
Air ChinaCheapest$706Average$792FlexibilityNo cancel feeOn-time67%
Malaysia AirlinesCheapest$865Average$1,337FlexibilityNo cancel feeOn-time67%
Singapore AirlinesCheapest$921Average$1,273FlexibilityNo cancel feeOn-time81%
Qatar AirwaysCheapest$968Average$1,104FlexibilityNo cancel feeOn-time68%
Thai AirwaysCheapest$1,120Average$1,305FlexibilityNo cancel feeOn-time77%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.