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Cheap flights from London to Phnom Penh from £240

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 6/5. Fares are subject to change and may not be available on all flights or dates of travel.
LON — PNH
20 Apr — 27 Apr1
1 adult

Cheapflights Tip: The best prices from London to Phnom Penh Pochentong are usually found in November or March, booked 62 days in advance, depart on a Monday or Saturday and return on a Sunday

Cheap flight deals from London to Phnom Penh

Discover tips and strategies to find the most affordable flight options for your journey from London (LON) 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 15 April 2025.

Round-trip from

£491

One-way from

£240

Popular in

August

Cheapest in

November

Average price

£803
China Southern
  • China Southern
  • 15/5-29/5
  • 2 total stops
  • 51h 20m total
  • London to Phnom Penh
6/5
  • 6/5
  • 3 total stops
  • 44h 50m total
  • London to Phnom Penh
Highest demand for flights based on searches. 10% potential increase in price (£58 potential increase over avg. return price).
Cheapest flight prices on average. 2% potential price decrease (£13 potential savings vs. average return price).
Average for round-trip flights in April 2025

Find flight deals from London to Phnom Penh

Cheapest flights from London to Phnom Penh
Explore the most affordable flight options available from London to Phnom Penh. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 April 2025.

Tue 22/422:10LHR - PNH
1 stop20h 00mChina Southern
Tue 6/508:00PNH - LHR
2 stops38h 15mChina Southern
Deal found 14/4£491
Mon 27/1020:25LHR - PNH
1 stop19h 45mAir China
Sun 9/1100:25PNH - LHR
1 stop22h 30mAir China
Deal found 14/4£492
Sat 7/622:05LHR - PNH
1 stop31h 05mShenzhen Airlines
Sun 22/612:15PNH - LHR
1 stop37h 35mShenzhen Airlines
Deal found 14/4£498
Mon 1/1211:40LGW - PNH
2 stops52h 30mAir China
Fri 12/1200:25PNH - LGW
2 stops37h 30mAir China
Deal found 14/4£509
Tue 10/621:30LGW - PNH
2 stops31h 10mChina Southern
Thu 26/612:05PNH - LGW
1 stop25h 05mChina Southern
Deal found 14/4£521
Thu 8/511:35LGW - PNH
1 stop29h 40mChina Eastern
Wed 28/500:10PNH - LGW
1 stop20h 50mChina Eastern
Deal found 15/4£533
Fri 30/522:05LHR - PNH
1 stop31h 05mMultiple Airlines
Thu 5/600:20PNH - LHR
1 stop26h 10mMultiple Airlines
Deal found 14/4£543
Tue 22/411:35LGW - PNH
2 stops28h 45mMultiple Airlines
Tue 6/510:55PNH - LGW
2 stops34h 05mMultiple Airlines
Deal found 14/4£561
Fri 30/521:20LHR - PNH
3 stops32h 15mChina Eastern
Thu 5/600:10PNH - LHR
1 stop24h 30mChina Eastern
Deal found 14/4£578
Wed 7/507:25STN - PNH
3 stops32h 55mMultiple Airlines
Sun 18/521:15PNH - STN
3 stops32h 44mMultiple Airlines
Deal found 14/4£580
Tue 4/1109:20LGW - PNH
1 stop26h 15mSingapore Airlines
Tue 25/1114:50PNH - LGW
1 stop22h 35mSingapore Airlines
Deal found 14/4£626
Thu 8/509:25LHR - PNH
1 stop21h 45mSingapore Airlines
Sun 25/518:55PNH - LHR
1 stop26h 50mSingapore Airlines
Deal found 14/4£640

Cheapflights Fare Finder

Customise your flight search to find flights from London 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 15 April 2025.
Use the filters below to find and compare flights from London to Phnom Penh that are best for you.

Fly from

London

Fly to

Phnom Penh

Route

Depart

Return

Price

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Thu 15/5

22:10-14:30

1 stop34h 20m

Phnom Penh Pochentong

Thu 29/5

08:00-19:00

1 stop17h 00m

£491

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Sat 7/6

22:05-11:10

1 stop31h 05m

Phnom Penh Pochentong

Sun 22/6

12:15-19:50

1 stop37h 35m

£498

LondonPhnom Penh

LGW - PNH

LGWPNH

London Gatwick

Tue 10/6

21:30-10:40

2 stops31h 10m

Phnom Penh Pochentong

Thu 26/6

12:05-07:10

1 stop25h 05m

£521

LondonPhnom Penh

LGW - PNH

LGWPNH

London Gatwick

Thu 8/5

11:35-23:15

1 stop29h 40m

Phnom Penh Pochentong

Wed 28/5

00:10-15:00

1 stop20h 50m

£533

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Fri 30/5

22:05-11:10

1 stop31h 05m

Phnom Penh Pochentong

Thu 5/6

00:20-20:30

1 stop26h 10m

£543

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Sat 31/5

20:25-11:10

2 stops32h 45m

Phnom Penh Pochentong

Sat 7/6

12:15-17:45

2 stops35h 30m

£550

LondonPhnom Penh

LGW - PNH

LGWPNH

London Gatwick

Sun 11/5

06:50-16:35

2 stops51h 45m

Phnom Penh Pochentong

Thu 15/5

00:10-15:10

1 stop21h 00m

£568

LondonPhnom Penh

LGW - PNH

LGWPNH

London Gatwick

Sat 31/5

11:25-11:10

2 stops41h 45m

Phnom Penh Pochentong

Sat 7/6

12:15-06:55

2 stops48h 40m

£577

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Fri 30/5

21:20-11:35

3 stops32h 15m

Phnom Penh Pochentong

Thu 5/6

00:10-18:40

1 stop24h 30m

£578

LondonPhnom Penh

STN - PNH

STNPNH

London Stansted

Wed 7/5

07:25-22:20

3 stops32h 55m

Phnom Penh Pochentong

Sun 18/5

21:15-23:59

3 stops32h 44m

£580

Flights are sorted by cheapest return flights first.

Deals found on 14/4

Showing 1-10 of 51 results
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Best time to book a flight from London to Phnom Penh

Have a flexible travel schedule? Discover the best time to fly to Phnom Penh from London 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.

Cheapflights Insights

Everything you need to know about your flight from London to Phnom Penh

How far ahead should I book a flight from London to Phnom Penh?

Use this chart to determine the optimal time to book a return flight from London to Phnom Penh. Price data was last updated on 11 April 2025.

Booking 62 days in advance of your planned departure date is, on average, the best time to get cheap flights from London to Phnom Penh. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from London to Phnom Penh?

Currently, September is the cheapest month in which you can book a flight from London to Phnom Penh (average of £689). Flying from London 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 LON to PNH?

Find hourly flight availability from London 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 15 April 2025.

When flying from London 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 36% versus a flight at midday.

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

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

Travellers seeking maximum savings on their London to Phnom Penh flight should consider departing on Saturday evenings when fares are most often at their lowest. Saturday 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 15 April 2025.
Get a feel of what it's like to fly with Singapore Airlines, Emirates and KLM from London to Phnom Penh by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Boarding

8.2

Comfort

7.9

Food

7.7

Overall

8.1

Crew

8.6

Entertainment

8.0

Reviews

1 / 20
6.0
Good

Gina,Dec 2024

BLR - SIN

Overall the experience was good. First flight of 17 hours had no entertainment since Singapore airline has technical issues. Was informed that passengers would get a $350 voucher for future flight. Uncertain how that is being distributed but would like to understand if an email is required from my end or if it is an automatic email sent to me by Singapore Airlines. -Gina Robles

Boarding

8.2

Comfort

7.9

Food

7.7

Overall

8.1

Crew

8.6

Entertainment

8.0

Reviews

1 / 20
6.0
Good

Gina,Dec 2024

BLR - SIN

Overall the experience was good. First flight of 17 hours had no entertainment since Singapore airline has technical issues. Was informed that passengers would get a $350 voucher for future flight. Uncertain how that is being distributed but would like to understand if an email is required from my end or if it is an automatic email sent to me by Singapore Airlines. -Gina Robles

Boarding

8.2

Comfort

7.9

Food

7.7

Overall

8.1

Crew

8.6

Entertainment

8.0

Reviews

1 / 20
6.0
Good

Gina,Dec 2024

BLR - SIN

Overall the experience was good. First flight of 17 hours had no entertainment since Singapore airline has technical issues. Was informed that passengers would get a $350 voucher for future flight. Uncertain how that is being distributed but would like to understand if an email is required from my end or if it is an automatic email sent to me by Singapore Airlines. -Gina Robles

Boarding

8.2

Comfort

7.9

Food

7.7

Overall

8.1

Crew

8.6

Entertainment

8.0

Reviews

1 / 20
6.0
Good

Gina,Dec 2024

BLR - SIN

Overall the experience was good. First flight of 17 hours had no entertainment since Singapore airline has technical issues. Was informed that passengers would get a $350 voucher for future flight. Uncertain how that is being distributed but would like to understand if an email is required from my end or if it is an automatic email sent to me by Singapore Airlines. -Gina Robles

Boarding

8.2

Comfort

7.9

Food

7.7

Overall

8.1

Crew

8.6

Entertainment

8.0

Reviews

1 / 20
6.0
Good

Gina,Dec 2024

BLR - SIN

Overall the experience was good. First flight of 17 hours had no entertainment since Singapore airline has technical issues. Was informed that passengers would get a $350 voucher for future flight. Uncertain how that is being distributed but would like to understand if an email is required from my end or if it is an automatic email sent to me by Singapore Airlines. -Gina Robles

Boarding

8.2

Comfort

7.9

Food

7.7

Overall

8.1

Crew

8.6

Entertainment

8.0

Reviews

1 / 20
6.0
Good

Gina,Dec 2024

BLR - SIN

Overall the experience was good. First flight of 17 hours had no entertainment since Singapore airline has technical issues. Was informed that passengers would get a $350 voucher for future flight. Uncertain how that is being distributed but would like to understand if an email is required from my end or if it is an automatic email sent to me by Singapore Airlines. -Gina Robles

Related info for your journey

Find useful and relevant information for your journey from London 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?

    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. Booking flights from London to Pochentong (PNH) should be relatively easy as there are 0 daily inbound flights from London from 12 different airlines.

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

    Our cheapest airline available from London to Phnom Penh is China Southern. Our recent data shows that you can find tickets from as low as £491 on this airline. Additional options worth looking into are Shenzhen Airlines and China Eastern, starting at £498 and £533 round-trip. China Southern is 27% cheaper than the average price of flights available within the next 90 days to this destination.

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

    One-way options have recently been found by users for as low as £315 on Singapore Airlines. Other airlines that offer cheap prices include Shenzhen Airlines from £320 and China Eastern from £354 one-way.

  • What are the most popular routes from London to Phnom Penh?

  • Where are the most common stopover locations when flying from London to Phnom Penh?

  • What are some popular things to do or see while on a stopover in Guangzhou?

    Baima Clothing Wholesale Market, Yide Lu, and Guangzhou Zoo are the most popular attractions in Guangzhou if you're in need of something to do during your stopover. Baima Clothing Wholesale Market, Yide Lu, and Guangzhou Zoo can be accessed by travelling approximately 17.3 mi, 19.5 mi, and 17.2 mi, respectively from Guangzhou Baiyun.

  • What are some popular points of interest to see during a stopover in Singapore?

    If you're on a stopover in Singapore and looking for things to do, consider visiting Sentosa, Merlion, or Universal Studios Singapore. Sentosa, Merlion, and Universal Studios Singapore can be visited by travelling about 13.4 mi, 10.5 mi, and 13.4 mi respectively from Singapore Changi. Travellers can rent a car at Singapore Changi for an average daily rate of £95 to make sightseeing during their stopover a little easier.

  • Where are the least popular stopover locations for London to Phnom Penh flights?

  • Can I find deals for flights from London to Phnom Penh that include hotel bookings?

    Yes. In addition to deals on London to Phnom Penh flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from London to Phnom Penh?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Phnom Penh.

  • Can I find deals for business class flights from London to Phnom Penh?

    Yes. Cheapflights offers flight deals from London 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 to Phnom Penh?

    Currently, September is the cheapest month in which you can book a flight from London to Phnom Penh (average of £689). Flying from London 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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Fly from London to Phnom Penh on these airlines

Choose from the following airlines for your flight from London to Phnom Penh. Flights are based on user searches made on Cheapflights and were last updated on 15 April 2025.

Top 10 airlines flying from London to Phnom Penh

Discover the top 10 airlines that operate flights from London 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 15 April 2025.
AirlineCheapestAverageFlexibilityOn-time
Air ChinaCheapest£313Average£552FlexibilityNo cancel feeOn-time67%
Search Air China flights
Shenzhen AirlinesCheapest£390Average£462FlexibilityNo cancel feeOn-time63%
Search Shenzhen Airlines flights
China SouthernCheapest£410Average£527FlexibilityNo cancel feeOn-time69%
Search China Southern flights
China EasternCheapest£585Average£646FlexibilityNo cancel feeOn-time62%
Search China Eastern flights
Singapore AirlinesCheapest£617Average£722FlexibilityNo cancel feeOn-time81%
Search Singapore Airlines flights
Malaysia AirlinesCheapest£660Average£757FlexibilityNo cancel feeOn-time67%
Search Malaysia Airlines flights
British AirwaysCheapest£661Average£867FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Cathay PacificCheapest£673Average£793FlexibilityNo cancel feeOn-time72%
Search Cathay Pacific flights
Qatar AirwaysCheapest£674Average£804FlexibilityNo cancel feeOn-time68%
Search Qatar Airways flights
Vietnam AirlinesCheapest£689Average£769FlexibilityNo cancel feeOn-time81%
Search Vietnam Airlines 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 London to Phnom Penh?

Deals for London to Phnom Penh flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from London 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 London.

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

Certainly. Search results for flights to Phnom Penh from London shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

Yes! Start tracking prices for London to Phnom Penh flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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