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Cheap flights from London Heathrow Airport to Phnom Penh from £323

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 2/6. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — PNH
27 Feb — 6 Mar1
1 adult

The best prices from London Heathrow to Phnom Penh Pochentong are usually found in May or March, booked 67 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 22 February 2025.

Round-trip from

£493

One-way from

£324

Popular in

August

Cheapest in

May

Average price

£700
Shenzhen Airlines
  • Shenzhen Airlines
  • 14/3-29/3
  • 2 total stops
  • 68h 50m total
  • London to Phnom Penh
Search Deals
Shenzhen Airlines
  • Shenzhen Airlines
  • 14/5
  • 1 total stop
  • 31h 05m total
  • London to Phnom Penh
Search Deals
Highest demand for flights based on searches. 17% potential increase in price (£123 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£23 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 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 22 February 2025.

Fri 14/321:10LHR - PNH
1 stop31h 05mMultiple Airlines
Sat 29/312:15PNH - LHR
1 stop37h 45mMultiple Airlines
Deal found 20/2£493
Fri 7/321:10LHR - PNH
1 stop31h 05mShenzhen Airlines
Tue 18/312:15PNH - LHR
1 stop37h 55mShenzhen Airlines
Deal found 20/2£496
Mon 1/1220:25LHR - PNH
1 stop19h 45mAir China
Mon 15/1200:25PNH - LHR
1 stop24h 25mAir China
Deal found 20/2£499
Fri 7/322:00LHR - PNH
1 stop18h 30mChina Southern
Mon 24/308:00PNH - LHR
1 stop17h 15mChina Southern
Deal found 20/2£530
Fri 28/221:00LHR - PNH
1 stop19h 15mChina Eastern
Sun 16/300:15PNH - LHR
1 stop20h 40mChina Eastern
Deal found 20/2£538
Tue 10/609:25LHR - PNH
1 stop26h 15mSingapore Airlines
Tue 1/718:55PNH - LHR
1 stop26h 50mSingapore Airlines
Deal found 21/2£629
Mon 24/1121:15LHR - PNH
1 stop30h 20mChina Airlines
Thu 4/1217:20PNH - LHR
1 stop30h 45mChina Airlines
Deal found 20/2£672
Wed 17/918:55LHR - PNH
2 stops36h 05mVietnam Airlines
Wed 1/1014:10PNH - LHR
1 stop32h 45mVietnam Airlines
Deal found 20/2£698
Thu 27/321:25LHR - PNH
1 stop29h 25mMalaysia Airlines
Fri 11/411:10PNH - LHR
1 stop35h 25mMalaysia Airlines
Deal found 21/2£703

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 22 February 2025.

Fly from

Heathrow

Fly to

Phnom Penh

Route

Depart

Return

Price

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Fri 14/3

21:10-11:15

1 stop31h 05m

Phnom Penh Pochentong

Sat 29/3

12:15-19:00

1 stop37h 45m

£493

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Fri 7/3

21:10-11:15

1 stop31h 05m

Phnom Penh Pochentong

Tue 18/3

12:15-19:10

1 stop37h 55m

£496

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Mon 17/3

17:40-11:15

2 stops34h 35m

Phnom Penh Pochentong

Fri 28/3

19:50-19:40

2 stops30h 50m

£497

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Fri 7/3

22:00-23:30

1 stop18h 30m

Phnom Penh Pochentong

Mon 24/3

08:00-18:15

1 stop17h 15m

£530

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Fri 7/3

21:00-23:15

1 stop19h 15m

Phnom Penh Pochentong

Mon 17/3

00:15-13:55

1 stop20h 40m

£538

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Tue 10/6

09:25-17:40

1 stop26h 15m

Phnom Penh Pochentong

Tue 1/7

18:55-15:45

1 stop26h 50m

£629

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Thu 27/3

21:25-09:50

1 stop29h 25m

Phnom Penh Pochentong

Fri 11/4

11:10-16:35

1 stop35h 25m

£703

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Mon 2/6

22:05-11:10

1 stop31h 05m

£323

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Wed 23/4

20:15-18:15

2 stops40h 00m

£336

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Mon 28/4

22:40-11:10

2 stops30h 30m

£357

Flights are sorted by cheapest return flights first.

Deals found on 20/2

Showing 1-10 of 19 results
1
2

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 14 February 2025.

The best time to book flights from London Heathrow Airport to Phnom Penh is 67 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 22 February 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 22 February 2025.
Emirates
8.1
Very Good
3,276 reviews
Check prices

Crew

8.3

Entertainment

8.2

Overall

8.1

Boarding

8.1

Comfort

8.0

Food

7.9

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
8.1
Very Good
3,276 reviews
Emirates
8.1
Very Good
3,276 reviews
Check prices

Crew

8.3

Entertainment

8.2

Overall

8.1

Boarding

8.1

Comfort

8.0

Food

7.9

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.

Singapore Airlines
8.1
Very Good
1,297 reviews
Emirates
8.1
Very Good
3,276 reviews
Check prices

Crew

8.3

Entertainment

8.2

Overall

8.1

Boarding

8.1

Comfort

8.0

Food

7.9

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
7.6
Good
87 reviews
Emirates
8.1
Very Good
3,276 reviews
Check prices

Crew

8.3

Entertainment

8.2

Overall

8.1

Boarding

8.1

Comfort

8.0

Food

7.9

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
8.1
Very Good
3,276 reviews
Check prices

Crew

8.3

Entertainment

8.2

Overall

8.1

Boarding

8.1

Comfort

8.0

Food

7.9

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.

Qatar Airways
7.4
Good
3,609 reviews
Emirates
8.1
Very Good
3,276 reviews
Check prices

Crew

8.3

Entertainment

8.2

Overall

8.1

Boarding

8.1

Comfort

8.0

Food

7.9

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 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 £496, Shenzhen Airlines will fly you from London Heathrow Airport to Phnom Penh and back. In addition to Shenzhen Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Air China and China Southern - these airlines can fly you to your destination from £504 and £530, respectively. You may be able to fly from London Heathrow Airport to Phnom Penh for 34% 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 £324. Air China flights start at £357 while deals on Etihad Airways start at £457 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

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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 22 February 2025.
AirlineCheapestAverageFlexibilityOn-time
Shenzhen AirlinesCheapest£406Average£477FlexibilityNo cancel feeOn-time63%
Search Shenzhen Airlines flights
China SouthernCheapest£411Average£550FlexibilityNo cancel feeOn-time69%
Search China Southern flights
Air ChinaCheapest£461Average£531FlexibilityNo cancel feeOn-time67%
Search Air China flights
China EasternCheapest£613Average£683FlexibilityNo cancel feeOn-time62%
Search China Eastern flights
Singapore AirlinesCheapest£649Average£748FlexibilityNo cancel feeOn-time81%
Search Singapore Airlines flights
Vietnam AirlinesCheapest£673Average£797FlexibilityNo cancel feeOn-time81%
Search Vietnam Airlines flights
Malaysia AirlinesCheapest£686Average£792FlexibilityNo cancel feeOn-time67%
Search Malaysia Airlines flights
Cathay PacificCheapest£700Average£822FlexibilityNo cancel feeOn-time72%
Search Cathay Pacific flights
Qatar AirwaysCheapest£745Average£939FlexibilityNo cancel feeOn-time68%
Search Qatar Airways flights
EmiratesCheapest£790Average£1,007FlexibilityNo cancel feeOn-time75%
Search Emirates flights

Fly with Cheapflights

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

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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.

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