Cheap flights from Phnom Penh to London from £239

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 13/8. Fares are subject to change and may not be available on all flights or dates of travel.
PNH — LON
4 Aug — 11 Aug1
1 adult

Cheapflights Tip: The best prices from Phnom Penh Pochentong to London are usually found in November or March, booked 44 days in advance, depart on a Sunday or Friday and return on a Monday

Cheap flight deals from Phnom Penh to London

Discover tips and strategies to find the most affordable flight options for your journey from Phnom Penh (PNH) to London (LON). 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 30 July 2025.

Round-trip from

£488

One-way from

£239

Popular in

July

Cheapest in

November

Average price

£1,017
China Southern
  • China Southern
  • 27/11-30/11
  • 3 total stops
  • 47h 35m total
  • Phnom Penh to London
China Southern
  • China Southern
  • 13/8
  • 1 total stop
  • 25h 00m total
  • Phnom Penh to London
Highest demand for flights based on searches. 12% potential increase in price (£78 potential increase over avg. return price).
Cheapest flight prices on average. 4% potential price decrease (£22 potential savings vs. average return price).
Average for round-trip flights in July 2025

Find flight deals from Phnom Penh to London

Cheapest flights from Phnom Penh to London
Explore the most affordable flight options available from Phnom Penh to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 July 2025.

Thu 27/1108:00PNH - LHR
1 stop17h 15mChina Southern
Sun 30/1121:30LHR - PNH
2 stops30h 20mChina Southern
Deal found 28/7£488
Sun 17/800:10PNH - LGW
1 stop36h 30mChina Eastern
Wed 17/918:25LGW - PNH
1 stop22h 50mChina Eastern
Deal found 29/7£501
Thu 11/912:05PNH - LGW
1 stop25h 05mChina Southern
Thu 18/912:00LGW - PNH
1 stop20h 30mChina Southern
Deal found 28/7£549
Mon 18/812:40PNH - LHR
2 stops36h 00mChina Eastern
Wed 17/921:20LHR - PNH
1 stop19h 55mChina Eastern
Deal found 29/7£591
Wed 26/1100:15PNH - LHR
1 stop24h 15mMultiple Airlines
Sun 30/1121:10LHR - PNH
1 stop30h 30mMultiple Airlines
Deal found 28/7£596
Thu 18/1200:25PNH - LHR
1 stop24h 25mAir China
Fri 2/117:40LHR - PNH
1 stop22h 30mAir China
Deal found 27/7£617
Thu 11/915:35PNH - LCY
2 stops23h 15mMultiple Airlines
Thu 18/907:45LCY - PNH
2 stops20h 55mMultiple Airlines
Deal found 28/7£667
Wed 10/900:10PNH - LGW
1 stop20h 50mMultiple Airlines
Thu 18/912:00LGW - PNH
1 stop16h 40mMultiple Airlines
Deal found 29/7£668
Fri 12/908:25PNH - STN
3 stops36h 00mMultiple Airlines
Fri 19/907:15STN - PNH
3 stops25h 05mMultiple Airlines
Deal found 29/7£695
Fri 19/1217:10PNH - LHR
2 stops27h 10mBritish Airways
Fri 2/108:05LHR - PNH
2 stops24h 20mBritish Airways
Deal found 27/7£743
Sat 9/820:50PNH - STN
2 stops22h 05mEmirates
Fri 15/821:10STN - PNH
2 stops37h 25mEmirates
Deal found 28/7£933
Thu 11/918:55PNH - LCY
2 stops19h 55mSWISS
Thu 18/909:25LCY - PNH
2 stops41h 15mSWISS
Deal found 29/7£963

Cheapflights Fare Finder

 
Customise your flight search to find flights from Phnom Penh to London 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 30 July 2025.
Use the filters below to find and compare flights from Phnom Penh to London that are best for you.

Fly from

Phnom Penh

Fly to

London

Route

Depart

Return

Price

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Thu 27/11

08:00-18:15

1 stop17h 15m

London Heathrow

Sun 30/11

21:30-10:50

2 stops30h 20m

£488

Phnom PenhLondon

PNH - LGW

PNHLGW

Phnom Penh Pochentong

Sun 17/8

00:10-06:40

1 stop36h 30m

London Gatwick

Wed 17/9

18:25-23:15

1 stop22h 50m

£501

Phnom PenhLondon

PNH - LGW

PNHLGW

Phnom Penh Pochentong

Thu 11/9

12:05-07:10

1 stop25h 05m

London Gatwick

Thu 18/9

12:00-14:30

1 stop20h 30m

£549

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Mon 18/8

12:40-18:40

2 stops36h 00m

London Heathrow

Wed 17/9

21:20-23:15

1 stop19h 55m

£591

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Wed 26/11

00:15-17:30

1 stop24h 15m

London Heathrow

Sun 30/11

21:10-10:40

1 stop30h 30m

£596

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Thu 18/12

00:25-17:50

1 stop24h 25m

London Heathrow

Fri 2/1

17:40-23:10

1 stop22h 30m

£617

Phnom PenhLondon

PNH - LCY

PNHLCY

Phnom Penh Pochentong

Thu 11/9

15:35-08:50

2 stops23h 15m

London City

Thu 18/9

07:45-10:40

2 stops20h 55m

£667

Phnom PenhLondon

PNH - LGW

PNHLGW

Phnom Penh Pochentong

Wed 10/9

00:10-15:00

1 stop20h 50m

London Gatwick

Thu 18/9

12:00-10:40

1 stop16h 40m

£668

Phnom PenhLondon

PNH - STN

PNHSTN

Phnom Penh Pochentong

Fri 12/9

08:25-14:25

3 stops36h 00m

London Stansted

Fri 19/9

07:15-14:20

3 stops25h 05m

£695

Phnom PenhLondon

PNH - LGW

PNHLGW

Phnom Penh Pochentong

Sun 28/9

17:40-06:40

2 stops19h 00m

London Gatwick

Sun 12/10

14:55-16:15

2 stops19h 20m

£718

Flights are sorted by cheapest return flights first.

Deals found on 28/7

Showing 1-10 of 38 results
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Best time to book a flight from Phnom Penh to London

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

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

Use this chart to determine the optimal time to book a return flight from Phnom Penh to London. Price data was last updated on 25 July 2025.

Booking 44 days in advance of your planned departure date is, on average, the best time to get cheap flights from Phnom Penh to London. 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 Phnom Penh to London?

Currently, January is the cheapest month in which you can book a flight from Phnom Penh to London (average of £112). Flying from Phnom Penh to London in August is currently the most expensive (average of £164). 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’s the top stopover airport for flights from Phnom Penh to London?

Share of one-stop return flights from Phnom Penh to London chosen by Cheapflights users in the past 12 months, using the same stopover each way.

Guangzhou (CAN) – chosen by Cheapflights users on 44% of one-stop itineraries from Phnom Penh to London on Cheapflights.

What’s the cheapest stopover airport for flights from Phnom Penh to London?

Average return fare for one-stop flights from Phnom Penh to London, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Guangzhou (CAN) is the most affordable one-stop option, with an average return flight price of £516.

What’s the fastest stopover option from Phnom Penh to London?

Shortest average travel time for one-stop one-way flights from Phnom Penh to London, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Flights via Abu Dhabi (AUH) have the shortest average one-way travel time for one-stop routes: 8h 55m.

Which airport typically offers the quickest stopover for flights from Phnom Penh to London?

Average stopover duration for one-stop one-way flights from Phnom Penh to London, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Abu Dhabi (AUH) offer the fastest connection on this route, with an average stopover time of 1h 19m.

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. 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 London. Reviews last updated 30 July 2025.
See what other customers who have flown with Asiana Airlines, Emirates, andSingapore Airlines from Phnom Penh to London have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Boarding

8.4

Overall

8.2

Entertainment

7.7

Comfort

8.1

Crew

8.5

Food

8.0

Reviews

1 / 20
10.0
Excellent

Jacob,Jul 2025

ICN - JFK

I flew business calls Asiana, everything was great and good! I must say that the service at the Asian business class lounge prior to the flight is very poor, the staff are very cold and not welcome and I asked for some help in getting a food without salt ...I was looked upon as if I ... I am traveling a lot business , and I se people complained a lot in asiana lounge services. Jacob

Boarding

8.4

Overall

8.2

Entertainment

7.7

Comfort

8.1

Crew

8.5

Food

8.0

Reviews

1 / 20
10.0
Excellent

Jacob,Jul 2025

ICN - JFK

I flew business calls Asiana, everything was great and good! I must say that the service at the Asian business class lounge prior to the flight is very poor, the staff are very cold and not welcome and I asked for some help in getting a food without salt ...I was looked upon as if I ... I am traveling a lot business , and I se people complained a lot in asiana lounge services. Jacob

Boarding

8.4

Overall

8.2

Entertainment

7.7

Comfort

8.1

Crew

8.5

Food

8.0

Reviews

1 / 20
10.0
Excellent

Jacob,Jul 2025

ICN - JFK

I flew business calls Asiana, everything was great and good! I must say that the service at the Asian business class lounge prior to the flight is very poor, the staff are very cold and not welcome and I asked for some help in getting a food without salt ...I was looked upon as if I ... I am traveling a lot business , and I se people complained a lot in asiana lounge services. Jacob

Boarding

8.4

Overall

8.2

Entertainment

7.7

Comfort

8.1

Crew

8.5

Food

8.0

Reviews

1 / 20
10.0
Excellent

Jacob,Jul 2025

ICN - JFK

I flew business calls Asiana, everything was great and good! I must say that the service at the Asian business class lounge prior to the flight is very poor, the staff are very cold and not welcome and I asked for some help in getting a food without salt ...I was looked upon as if I ... I am traveling a lot business , and I se people complained a lot in asiana lounge services. Jacob

Boarding

8.4

Overall

8.2

Entertainment

7.7

Comfort

8.1

Crew

8.5

Food

8.0

Reviews

1 / 20
10.0
Excellent

Jacob,Jul 2025

ICN - JFK

I flew business calls Asiana, everything was great and good! I must say that the service at the Asian business class lounge prior to the flight is very poor, the staff are very cold and not welcome and I asked for some help in getting a food without salt ...I was looked upon as if I ... I am traveling a lot business , and I se people complained a lot in asiana lounge services. Jacob

Boarding

8.4

Overall

8.2

Entertainment

7.7

Comfort

8.1

Crew

8.5

Food

8.0

Reviews

1 / 20
10.0
Excellent

Jacob,Jul 2025

ICN - JFK

I flew business calls Asiana, everything was great and good! I must say that the service at the Asian business class lounge prior to the flight is very poor, the staff are very cold and not welcome and I asked for some help in getting a food without salt ...I was looked upon as if I ... I am traveling a lot business , and I se people complained a lot in asiana lounge services. Jacob

Related info for your journey

Find useful and relevant information for your journey from Phnom Penh to London. 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 from for flights from Phnom Penh to London?

    Phnom Penh Pochentong (PNH) is the airport you will fly out of if you book a flight from Phnom Penh to London. You should not have trouble finding flights to London from Pochentong; the airport handles an average of 0 outbound flights to London per day. You should also have plenty of airline options to choose from since 0 airlines have flights from the Phnom Penh airport to London. It is only a 5.0 mi journey to Pochentong (PNH) from Phnom Penh’s city center.

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

    China Southern, at £488, was found to be the cheapest airline from Phnom Penh to London.Alternate airlines flying return to your destination include China Eastern and Air China. China Southern is currently priced 30% below the average price you’ll pay for this route.

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

    The cheapest airline one-way is China Southern, with whom users have recently found tickets for as low as £239. However, be on the lookout for offers from China Eastern and Air China, as they are both options that can get you from Phnom Penh to London for a low price.

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

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Phnom Penh to London (average of £112). Flying from Phnom Penh to London in August is currently the most expensive (average of £164). 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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Alternative routes for Phnom Penh to London

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

Yes, we can. To see specific flights from Phnom Penh to London with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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

Yes, Cheapflights offers price alerts on Phnom Penh to London flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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