Find flights
When to book
Airlines
FAQs

Cheap flights from London Heathrow Airport to Phnom Penh from £332

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 19/2. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — PNH
22 Jan — 29 Jan1
1 adult

The best prices from London Heathrow to Phnom Penh Pochentong are usually found in May or March, booked 44 days in advance, depart on a Monday or Saturday and return on a Wednesday

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 17 January 2025.

Round-trip from

£521

One-way from

£332

Popular in

August

Cheapest in

May

Average price

£765
Air China
  • Air China
  • 12/2-11/3
  • 2 total stops
  • 42h 15m total
  • London to Phnom Penh
Search Deals
19/2
  • 19/2
  • 3 total stops
  • 58h 30m total
  • London to Phnom Penh
Search Deals
High demand for flights, 16% potential price rise
Search Deals
Best time to find cheap flights, 3% potential price drop
Search Deals
Average for round-trip flights in January 2025
Search Deals

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 17 January 2025.

Wed 12/220:25LHR - PNH
1 stop19h 45mAir China
Tue 11/300:25PNH - LHR
1 stop22h 30mAir China
Deal found 16/1£521
Wed 29/121:30LHR - PNH
2 stops30h 20mChina Southern
Sat 22/215:50PNH - LHR
2 stops29h 10mChina Southern
Deal found 17/1£529
Wed 22/121:10LHR - PNH
1 stop31h 05mShenzhen Airlines
Fri 21/219:50PNH - LHR
1 stop30h 20mShenzhen Airlines
Deal found 16/1£533
Mon 24/221:10LHR - PNH
1 stop38h 40mMultiple Airlines
Fri 28/219:50PNH - LHR
2 stops29h 00mMultiple Airlines
Deal found 16/1£576
Sat 15/322:05LHR - PNH
1 stop33h 00mSingapore Airlines
Sat 29/319:45PNH - LHR
1 stop26h 00mSingapore Airlines
Deal found 16/1£595
Mon 3/321:00LHR - PNH
1 stop19h 15mChina Eastern
Sun 23/300:15PNH - LHR
1 stop20h 40mChina Eastern
Deal found 16/1£627
Thu 23/116:50LHR - PNH
1 stop17h 55mCathay Pacific
Mon 3/211:45PNH - LHR
1 stop34h 15mCathay Pacific
Deal found 16/1£731
Sat 15/310:25LHR - PNH
1 stop24h 05mMalaysia Airlines
Tue 6/518:20PNH - LHR
1 stop28h 15mMalaysia Airlines
Deal found 16/1£736

Find flights from Heathrow to Phnom Penh within your budget

Customise 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 858,174 searches. Data last updated 17 January 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Wed 12/2

20:25-23:10

1 stop19h 45m

Phnom Penh Pochentong

Tue 11/3

00:25-15:55

1 stop22h 30m

£521

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Wed 29/1

21:30-10:50

2 stops30h 20m

Phnom Penh Pochentong

Sat 22/2

15:50-14:00

2 stops29h 10m

£529

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Sat 1/2

21:10-17:10

1 stop37h 00m

Phnom Penh Pochentong

Sun 23/2

12:15-19:10

1 stop37h 55m

£534

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Mon 24/2

21:10-18:50

1 stop38h 40m

Phnom Penh Pochentong

Fri 28/2

19:50-17:50

2 stops29h 00m

£576

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Sat 15/3

22:05-14:05

1 stop33h 00m

Phnom Penh Pochentong

Sat 29/3

19:45-14:45

1 stop26h 00m

£595

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Mon 3/3

21:00-23:15

1 stop19h 15m

Phnom Penh Pochentong

Sun 23/3

00:15-13:55

1 stop20h 40m

£627

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Sun 11/5

19:50-13:00

2 stops35h 10m

Phnom Penh Pochentong

Sun 1/6

20:55-17:05

1 stop26h 10m

£695

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Sat 15/3

10:25-17:30

1 stop24h 05m

Phnom Penh Pochentong

Tue 6/5

18:20-16:35

1 stop28h 15m

£736

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Mon 2/6

15:05-16:15

2 stops19h 10m

Phnom Penh Pochentong

Tue 10/6

17:40-13:15

2 stops25h 35m

£748

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Thu 6/2

11:00-10:25

1 stop16h 25m

Phnom Penh Pochentong

Mon 17/2

11:45-15:00

1 stop34h 15m

£751

Flights are sorted by cheapest return flights first.

Deals found on 16/1

Showing 1-10 of 21 results
1
2
3

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 return 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.

Travel insights for flights from Heathrow to Phnom Penh

Get recent, data-driven insights about flights from Heathrow to Phnom Penh including ideal travel times, pricing trends, and more.

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 return flight from Heathrow to Phnom Penh. Price data was last updated on 10 January 2025.

The best time to book flights from London Heathrow Airport to Phnom Penh is 44 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, September is the cheapest month in which you can book a flight from London Heathrow Airport to Phnom Penh (average of £689). Flying from London Heathrow Airport to Phnom Penh in July is currently the most expensive (average of £1,232). 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 17 January 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 evening, which can drop the price by up to 39% versus a flight at midday.

What is the cheapest day to fly from London Heathrow Airport to Phnom Penh?

Use this chart to determine the cheapest time to fly return from Heathrow to Phnom Penh. Price data was last updated on 16 December 2024.

Travellers seeking maximum savings on their London Heathrow Airport to Phnom Penh flight should consider departing on Monday evenings when fares are most often at their lowest. Friday at midday flights should be avoided if possible as fares are typically the most expensive at this time.

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 - 250.0 inches per month. October is typically the wettest month, when rainfall can reach 250.0 mm. January is typically the driest time to visit Phnom Penh when rainfall is around 0.0 mm.

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 29.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 25.0 C).

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 17 January 2025.
Read reviews from past customers who have flown China Southern, China Eastern and Malaysia Airlines from London to Phnom Penh. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Emirates
8.1
Very Good
3,351 reviews
Check prices

Crew

8.3

Comfort

8.0

Food

7.9

Overall

8.1

Boarding

8.1

Entertainment

8.2

Reviews

1 / 10

Worst experience. The staff at the airport were unprofessional, uncourtious, disrespectful and straight up discriminating. I will never travel via emirates again. And the flight was delayed too.

Emirates
8.1
Very Good
3,351 reviews
Emirates
8.1
Very Good
3,351 reviews
Check prices

Crew

8.3

Comfort

8.0

Food

7.9

Overall

8.1

Boarding

8.1

Entertainment

8.2

Reviews

1 / 10

Worst experience. The staff at the airport were unprofessional, uncourtious, disrespectful and straight up discriminating. I will never travel via emirates again. And the flight was delayed too.

Singapore Airlines
8.1
Very Good
1,327 reviews
Emirates
8.1
Very Good
3,351 reviews
Check prices

Crew

8.3

Comfort

8.0

Food

7.9

Overall

8.1

Boarding

8.1

Entertainment

8.2

Reviews

1 / 10

Worst experience. The staff at the airport were unprofessional, uncourtious, disrespectful and straight up discriminating. I will never travel via emirates again. And the flight was delayed too.

Vietnam Airlines
7.7
Good
210 reviews
Emirates
8.1
Very Good
3,351 reviews
Check prices

Crew

8.3

Comfort

8.0

Food

7.9

Overall

8.1

Boarding

8.1

Entertainment

8.2

Reviews

1 / 10

Worst experience. The staff at the airport were unprofessional, uncourtious, disrespectful and straight up discriminating. I will never travel via emirates again. And the flight was delayed too.

Cathay Pacific
7.5
Good
826 reviews
Emirates
8.1
Very Good
3,351 reviews
Check prices

Crew

8.3

Comfort

8.0

Food

7.9

Overall

8.1

Boarding

8.1

Entertainment

8.2

Reviews

1 / 10

Worst experience. The staff at the airport were unprofessional, uncourtious, disrespectful and straight up discriminating. I will never travel via emirates again. And the flight was delayed too.

Qatar Airways
7.5
Good
3,752 reviews
Emirates
8.1
Very Good
3,351 reviews
Check prices

Crew

8.3

Comfort

8.0

Food

7.9

Overall

8.1

Boarding

8.1

Entertainment

8.2

Reviews

1 / 10

Worst experience. The staff at the airport were unprofessional, uncourtious, disrespectful and straight up discriminating. I will never travel via emirates again. And the flight was delayed too.

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?

    Located just 5.0 mi from the city center, Phnom Penh Pochentong is the airport most travelers will use when flying to Phnom Penh from London Heathrow. Booking flights from London Heathrow to Pochentong (PNH) should be relatively easy as there are 0 daily inbound flights from London Heathrow from 12 different airlines.

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

    Currently priced at £521, Air China will fly you from London Heathrow Airport to Phnom Penh and back. In addition to Air China, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from China Southern and Shenzhen Airlines - these airlines can fly you to your destination from £529 and £533, respectively. You may be able to fly from London Heathrow Airport to Phnom Penh for 32% less than the average price by searching for these airlines.

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

    To fly one-way, consider booking your trip with Shenzhen Airlines, which is currently one of the cheapest options available, starting at £333. China Southern flights start at £339 while deals on Air China start at £384 one-way.

  • 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 holiday 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, September is the cheapest month in which you can book a flight from London Heathrow Airport to Phnom Penh (average of £689). Flying from London Heathrow Airport to Phnom Penh in July is currently the most expensive (average of £1,232). 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

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

Top 10 airlines flying from Heathrow to Phnom Penh

Discover the top 10 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 858,174 searches. Data last updated 17 January 2025.
AirlineCheapestAverageFlexibilityOn-time
Shenzhen AirlinesCheapest£420Average£494FlexibilityNo cancel feeOn-time63%
Search Shenzhen Airlines flights
China SouthernCheapest£428Average£561FlexibilityNo cancel feeOn-time69%
Search China Southern flights
Air ChinaCheapest£479Average£550FlexibilityNo cancel feeOn-time67%
Search Air China flights
China EasternCheapest£643Average£836FlexibilityNo cancel feeOn-time62%
Search China Eastern flights
Singapore AirlinesCheapest£687Average£777FlexibilityNo cancel feeOn-time81%
Search Singapore Airlines flights
Malaysia AirlinesCheapest£702Average£833FlexibilityNo cancel feeOn-time67%
Search Malaysia Airlines flights
Cathay PacificCheapest£723Average£864FlexibilityNo cancel feeOn-time72%
Search Cathay Pacific flights
Vietnam AirlinesCheapest£742Average£828FlexibilityNo cancel feeOn-time81%
Search Vietnam Airlines flights
Qatar AirwaysCheapest£772Average£941FlexibilityNo cancel feeOn-time68%
Search Qatar Airways flights
British AirwaysCheapest£818Average£947FlexibilityNo cancel feeOn-time70%
Search British Airways flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Heathrow to Phnom Penh?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Heathrow to Phnom Penh. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Phnom Penh?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Phnom Penh from Heathrow.

Can Cheapflights find flights from Heathrow to Phnom Penh with no change fees?

Yes! Cheapflights helps users easily find flights from Heathrow to Phnom Penh with no change fees.

Can Cheapflights notify me if prices for flights from Heathrow to Phnom Penh become cheaper?

Not ready to book yet? You can track prices for flights from Heathrow to Phnom Penh on Cheapflights with our Price Alert feature and get notified when better prices are available.

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.