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Cheap flights from London to Phnom Penh from £318

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 31/8. Fares are subject to change and may not be available on all flights or dates of travel.
LON — PNH
16 Jul — 23 Jul1
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 11 July 2025.

Round-trip from

£551

One-way from

£318

Popular in

December

Cheapest in

November

Average price

£797
China Southern
  • China Southern
  • 4/10-30/11
  • 2 total stops
  • 51h 35m total
  • London to Phnom Penh
Shenzhen Airlines
  • Shenzhen Airlines
  • 31/8
  • 1 total stop
  • 31h 05m total
  • London to Phnom Penh
High demand for flights, 0% potential price rise
Cheapest flight prices on average. 2% potential price decrease (£11 potential savings vs. average return price).
Average for round-trip flights in July 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 11 July 2025.

Sat 4/1022:10LHR - PNH
1 stop34h 20mChina Southern
Sun 30/1108:00PNH - LHR
1 stop17h 15mChina Southern
Deal found 11/7£551
Sat 30/822:05LHR - PNH
1 stop31h 05mShenzhen Airlines
Tue 30/912:15PNH - LHR
1 stop37h 45mShenzhen Airlines
Deal found 9/7£555
Mon 3/1117:00LGW - PNH
1 stop23h 15mChina Eastern
Sun 16/1100:15PNH - LGW
1 stop37h 15mChina Eastern
Deal found 10/7£555
Fri 19/912:00LGW - PNH
1 stop20h 30mChina Southern
Fri 3/1015:35PNH - LGW
2 stops32h 55mChina Southern
Deal found 11/7£556
Mon 1/1220:25LHR - PNH
2 stops31h 15mAir China
Sat 13/1211:40PNH - LHR
2 stops35h 15mAir China
Deal found 10/7£560
Wed 15/1022:05LHR - PNH
1 stop31h 05mMultiple Airlines
Tue 25/1100:15PNH - LHR
1 stop24h 15mMultiple Airlines
Deal found 11/7£564
Wed 5/1111:40LGW - PNH
2 stops28h 30mAir China
Sat 29/1100:25PNH - LGW
2 stops37h 30mAir China
Deal found 11/7£564
Mon 17/1107:30STN - PNH
3 stops28h 30mMultiple Airlines
Sat 29/1119:55PNH - STN
2 stops22h 05mMultiple Airlines
Deal found 10/7£567
Sun 16/1121:00LHR - PNH
2 stops54h 00mChina Eastern
Wed 26/1100:15PNH - LHR
1 stop24h 15mChina Eastern
Deal found 10/7£592
Mon 25/813:10LGW - PNH
2 stops27h 55mMultiple Airlines
Sun 31/800:20PNH - LGW
2 stops40h 00mMultiple Airlines
Deal found 10/7£599
Mon 6/1006:00LTN - PNH
3 stops30h 15mMultiple Airlines
Sat 18/1008:30PNH - LTN
3 stops33h 15mMultiple Airlines
Deal found 9/7£616
Wed 17/910:00LGW - PNH
1 stop25h 40mSingapore Airlines
Wed 1/1009:35PNH - LGW
1 stop26h 50mSingapore Airlines
Deal found 11/7£641

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 11 July 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

Sat 4/10

22:10-14:30

1 stop34h 20m

Phnom Penh Pochentong

Sun 30/11

08:00-18:15

1 stop17h 15m

£551

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Sat 30/8

22:05-11:10

1 stop31h 05m

Phnom Penh Pochentong

Tue 30/9

12:15-20:00

1 stop37h 45m

£555

LondonPhnom Penh

LGW - PNH

LGWPNH

London Gatwick

Fri 19/9

12:00-14:30

1 stop20h 30m

Phnom Penh Pochentong

Fri 3/10

15:35-18:30

2 stops32h 55m

£556

LondonPhnom Penh

STN - PNH

STNPNH

London Stansted

Mon 6/10

07:30-18:15

3 stops28h 45m

Phnom Penh Pochentong

Sat 18/10

08:30-06:50

2 stops28h 20m

£570

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Sat 4/10

22:40-23:05

1 stop18h 25m

Phnom Penh Pochentong

Mon 3/11

00:25-15:55

1 stop22h 30m

£576

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Mon 6/10

20:50-17:25

2 stops38h 35m

Phnom Penh Pochentong

Sat 18/10

08:30-07:00

1 stop28h 30m

£578

LondonPhnom Penh

LGW - PNH

LGWPNH

London Gatwick

Mon 25/8

13:10-23:05

2 stops27h 55m

Phnom Penh Pochentong

Sun 31/8

00:20-10:20

2 stops40h 00m

£599

LondonPhnom Penh

LTN - PNH

LTNPNH

London Luton

Mon 6/10

06:00-18:15

3 stops30h 15m

Phnom Penh Pochentong

Sat 18/10

08:30-11:45

3 stops33h 15m

£616

LondonPhnom Penh

LGW - PNH

LGWPNH

London Gatwick

Mon 25/8

20:45-23:05

1 stop20h 20m

Phnom Penh Pochentong

Sun 31/8

00:20-06:35

1 stop36h 15m

£639

LondonPhnom Penh

LGW - PNH

LGWPNH

London Gatwick

Wed 17/9

10:00-17:40

1 stop25h 40m

Phnom Penh Pochentong

Wed 1/10

09:35-06:25

1 stop26h 50m

£641

Flights are sorted by cheapest return flights first.

Deals found on 10/7

Showing 1-10 of 39 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 27 June 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 11 July 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.

How much does it cost for a return flight from London 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 11 July 2025.
Check out reviews from past customers who have flown with Emirates, Singapore Airlines, andKLM from London to Phnom Penh to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Crew

8.3

Food

7.8

Comfort

8.0

Boarding

8.1

Entertainment

8.2

Overall

8.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jun 2025

KTM - DXB

Lost 7 pieces of luggage and fly Dubai doesn’t seem to care.

Crew

8.3

Food

7.8

Comfort

8.0

Boarding

8.1

Entertainment

8.2

Overall

8.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jun 2025

KTM - DXB

Lost 7 pieces of luggage and fly Dubai doesn’t seem to care.

Crew

8.3

Food

7.8

Comfort

8.0

Boarding

8.1

Entertainment

8.2

Overall

8.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jun 2025

KTM - DXB

Lost 7 pieces of luggage and fly Dubai doesn’t seem to care.

Crew

8.3

Food

7.8

Comfort

8.0

Boarding

8.1

Entertainment

8.2

Overall

8.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jun 2025

KTM - DXB

Lost 7 pieces of luggage and fly Dubai doesn’t seem to care.

Crew

8.3

Food

7.8

Comfort

8.0

Boarding

8.1

Entertainment

8.2

Overall

8.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jun 2025

KTM - DXB

Lost 7 pieces of luggage and fly Dubai doesn’t seem to care.

Crew

8.3

Food

7.8

Comfort

8.0

Boarding

8.1

Entertainment

8.2

Overall

8.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jun 2025

KTM - DXB

Lost 7 pieces of luggage and fly Dubai doesn’t seem to care.

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 13 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 £551 on this airline. Additional options worth looking into are Shenzhen Airlines and Air China, starting at £555 and £576 round-trip. China Southern is 15% 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 £318 on Shenzhen Airlines. Other airlines that offer cheap prices include China Eastern from £354 and Air China from £380 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 Beijing?

    If you're on a stopover in Beijing and looking for things to do, consider visiting Summer Palace, Forbidden City, or The Antiquarium of the Palace Museum. Summer Palace, Forbidden City, and The Antiquarium of the Palace Museum can be visited by travelling about 17.3 mi, 15.1 mi, and 14.9 mi respectively from Beijing Capital.

  • 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 11 July 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 11 July 2025.
AirlineCheapestAverageFlexibilityOn-time
China SouthernCheapest£358Average£467FlexibilityNo cancel feeOn-time69%
Search China Southern flights
Shenzhen AirlinesCheapest£378Average£451FlexibilityNo cancel feeOn-time63%
Search Shenzhen Airlines flights
Air ChinaCheapest£422Average£492FlexibilityNo cancel feeOn-time67%
Search Air China flights
China EasternCheapest£506Average£585FlexibilityNo cancel feeOn-time62%
Search China Eastern flights
Etihad AirwaysCheapest£512Average£589FlexibilityNo cancel feeOn-time75%
Search Etihad Airways flights
Singapore AirlinesCheapest£586Average£699FlexibilityNo cancel feeOn-time81%
Search Singapore Airlines flights
Malaysia AirlinesCheapest£589Average£705FlexibilityNo cancel feeOn-time67%
Search Malaysia Airlines flights
British AirwaysCheapest£640Average£790FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Vietnam AirlinesCheapest£650Average£742FlexibilityNo cancel feeOn-time81%
Search Vietnam Airlines flights
Cathay PacificCheapest£666Average£785FlexibilityNo cancel feeOn-time72%
Search Cathay Pacific 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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