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Phnom Penh

$606+ 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 12/7. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — PNH
oct. 11 — oct. 181
sáb. 10/11
sáb. 10/18
1 adult, Economy
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Cheapflights Tip: The best prices from London Heathrow to Phnom Penh Pochentong are usually found in November or May, booked 79 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 septiembre 11, 2025.

Round-trip from

$698
(Gotogate)

One-way from

$606
(Etihad Airways)

Popular in

July

Cheapest in

November

Average price

$858
From London Heathrow to Phnom Penh Pochentong
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One-way flight from London Heathrow to Phnom Penh Pochentong
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Highest demand for flights based on searches. 16% potential increase in price ($185 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($35 potential savings vs. average RT price).
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Average for round-trip flights in September 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 septiembre 11, 2025.

This Etihad Airways deal was found by Cheapflights users on 9/11. 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 Etihad Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 10/59:30 amLHR - PNH
1 stop15h 25mEtihad Airways
mar. 12/27:55 amPNH - LHR
1 stop35h 10mEtihad Airways
Deal found 9/11$698
This oojo deal was found by Cheapflights users on 9/10. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 10/42:45 pmLHR - PNH
1 stop34h 10mEtihad Airways
mar. 11/47:50 pmPNH - LHR
1 stop23h 15mEtihad Airways
Deal found 9/10$717
This Etihad Airways deal was found by Cheapflights users on 9/11. 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 Etihad Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/258:50 amLHR - PNH
1 stop14h 40mEtihad Airways
mar. 1/207:55 amPNH - LHR
1 stop17h 15mEtihad Airways
Deal found 9/11$719
This Etihad Airways deal was found by Cheapflights users on 9/11. 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 Etihad Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 10/49:45 pmLHR - PNH
1 stop27h 10mEtihad Airways
mar. 12/27:50 pmPNH - LHR
1 stop29h 20mEtihad Airways
Deal found 9/11$725
This oojo deal was found by Cheapflights users on 9/11. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 10/119:45 pmLHR - PNH
1 stop27h 10mEtihad Airways
sáb. 10/188:30 amPNH - LHR
1 stop16h 15mEtihad Airways
Deal found 9/11$729
This Etihad Airways deal was found by Cheapflights users on 9/11. 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 Etihad Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/22:45 pmLHR - PNH
1 stop34h 10mEtihad Airways
mar. 12/27:55 amPNH - LHR
1 stop37h 35mEtihad Airways
Deal found 9/11$745
This Etihad Airways deal was found by Cheapflights users on 9/11. 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 Etihad Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 10/42:45 pmLHR - PNH
1 stop34h 10mEtihad Airways
lun. 12/17:55 amPNH - LHR
1 stop17h 15mEtihad Airways
Deal found 9/11$772
This Etihad Airways deal was found by Cheapflights users on 9/10. 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 Etihad Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/37:20 pmLHR - PNH
1 stop16h 05mEtihad Airways
mar. 12/27:55 amPNH - LHR
1 stop35h 10mEtihad Airways
Deal found 9/10$781
This Etihad Airways deal was found by Cheapflights users on 9/11. 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 Etihad Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/29:45 pmLHR - PNH
1 stop27h 10mEtihad Airways
lun. 12/17:55 amPNH - LHR
1 stop17h 15mEtihad Airways
Deal found 9/11$792
This Etihad Airways deal was found by Cheapflights users on 9/10. 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 Etihad Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/179:30 amLHR - PNH
1 stop15h 25mEtihad Airways
lun. 11/177:55 amPNH - LHR
1 stop17h 15mEtihad Airways
Deal found 9/10$806
This Etihad Airways deal was found by Cheapflights users on 9/10. 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 Etihad Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 10/189:45 pmLHR - PNH
1 stop27h 10mEtihad Airways
jue. 10/307:55 amPNH - LHR
1 stop29h 45mEtihad Airways
Deal found 9/10$808

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 septiembre 11, 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

lun. 11/10

8:50 am-6:30 am

1 stop14h 40m

Phnom Penh Pochentong

vie. 11/14

7:55 am-6:40 am

1 stop29h 45m

$698

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

jue. 12/25

8:50 am-6:30 am

1 stop14h 40m

Phnom Penh Pochentong

mar. 1/20

7:55 am-6:10 pm

1 stop17h 15m

$719

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

jue. 10/2

2:45 pm-6:55 am

1 stop34h 10m

Phnom Penh Pochentong

mar. 12/2

7:55 am-2:30 pm

1 stop37h 35m

$745

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

lun. 1/26

1:55 pm-6:25 pm

1 stop21h 30m

Phnom Penh Pochentong

jue. 1/29

7:50 pm-6:40 am

1 stop17h 50m

$749

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

jue. 10/2

9:45 pm-6:55 am

1 stop27h 10m

Phnom Penh Pochentong

lun. 12/1

7:55 am-6:10 pm

1 stop17h 15m

$792

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

vie. 10/17

9:30 am-6:55 am

1 stop15h 25m

Phnom Penh Pochentong

lun. 11/17

7:55 am-6:10 pm

1 stop17h 15m

$806

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

sáb. 10/11

10:25 pm-6:55 am

2 stops26h 30m

Phnom Penh Pochentong

sáb. 10/18

8:30 am-6:45 pm

1 stop16h 15m

$1,031

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

lun. 2/2

6:00 am-6:30 am

2 stops17h 30m

Phnom Penh Pochentong

lun. 2/16

7:55 am-6:40 am

1 stop29h 45m

$1,131

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

sáb. 10/4

2:45 pm-6:55 am

1 stop34h 10m

Phnom Penh Pochentong

vie. 11/28

7:55 am-2:30 pm

1 stop37h 35m

$1,139

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

jue. 10/2

9:45 pm-6:55 am

1 stop27h 10m

Phnom Penh Pochentong

vie. 11/28

7:55 am-12:05 pm

1 stop35h 10m

$1,159

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Showing 1-10 of 21 results
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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 August 29, 2025.

The best time to book flights from London Heathrow Airport to Phnom Penh is 79 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 $983). Flying from London Heathrow Airport to Phnom Penh in June is currently the most expensive (average of $1,553). 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 septiembre 11, 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.

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

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 septiembre 11, 2025.
Read reviews from past customers who have flown China Southern and Air China from London Heathrow Airport to Phnom Penh. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
China Southern
7.5
Good
110 reviews

Food

7.3

Boarding

8.0

Overall

7.5

Entertainment

7.5

Crew

8.3

Comfort

7.8

Reviews

1 / 5
6.0
Good

Ebbi,Aug 2025

LAX - CAN

Boarding was nice the employees and the crew. They were very nice but the food maybe I don’t like it but it’s not international food. It’s more towards Chinese Tayst, which I do understand but that’s only complain. I have.
China Southern
7.5
Good
110 reviews
China Southern
7.5
Good
110 reviews

Food

7.3

Boarding

8.0

Overall

7.5

Entertainment

7.5

Crew

8.3

Comfort

7.8

Reviews

1 / 5
6.0
Good

Ebbi,Aug 2025

LAX - CAN

Boarding was nice the employees and the crew. They were very nice but the food maybe I don’t like it but it’s not international food. It’s more towards Chinese Tayst, which I do understand but that’s only complain. I have.
Air China
7.2
Good
99 reviews
China Southern
7.5
Good
110 reviews

Food

7.3

Boarding

8.0

Overall

7.5

Entertainment

7.5

Crew

8.3

Comfort

7.8

Reviews

1 / 5
6.0
Good

Ebbi,Aug 2025

LAX - CAN

Boarding was nice the employees and the crew. They were very nice but the food maybe I don’t like it but it’s not international food. It’s more towards Chinese Tayst, which I do understand but that’s only complain. I have.

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 2 different airlines.

  • How long is the flight from London Heathrow Airport to Phnom Penh?

    Etihad Airways can get you from London Heathrow Airport to Phnom Penh in just under 14h 40m. Your travel time can differ by up to . The distance from London Heathrow Airport to Phnom Penh is about 6232 mi.

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

    According to our current data, Air China ($538), and China Southern ($555) offers the cheapest pricing from London Heathrow Airport to Phnom Penh. Users have found that Air China is 43% cheaper than the other options available to this destination.

  • 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 $983). Flying from London Heathrow Airport to Phnom Penh in June is currently the most expensive (average of $1,553). 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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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 2 airlines flying from Heathrow to Phnom Penh

Discover the top 2 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 septiembre 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air ChinaCheapest$538Average$1,165FlexibilityNo cancel feeOn-time67%
China SouthernCheapest$555Average$801FlexibilityNo cancel feeOn-time69%

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