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Cheap flights from Phnom Penh to London from £247

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Phnom Penh to London departing on 20/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags
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Find the cheapest flights from Phnom Penh to London

Cheap return flights

China Eastern Logo
12:40 - 15:00PNH-LGW
32h 20m3 stops
China Eastern Logo
18:00 - 23:15LGW-PNH
23h 15m1 stop
£518China Eastern
Find Deal
Fri, 22 Aug - Tue, 2 Sep
China Eastern Logo
00:15 - 14:00PNH-LGW
20h 45m1 stop
China Eastern Logo
17:00 - 23:15LGW-PNH
23h 15m1 stop
£524China Eastern
Find Deal
Thu, 18 Dec - Fri, 2 Jan
China Eastern Logo
00:15 - 06:30PNH-LGW
37h 15m1 stop
China Eastern Logo
17:00 - 10:00LGW-PNH
58h 00m3 stops
£529China Eastern
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Thu, 18 Dec - Fri, 2 Jan
China Southern Logo
08:00 - 19:00PNH-LHR
17h 00m1 stop
China Southern Logo
22:10 - 10:40LHR-PNH
30h 30m1 stop
£558China Southern
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Sat, 11 Oct - Thu, 23 Oct
China Southern Logo
08:00 - 19:00PNH-LHR
17h 00m1 stop
China Southern Logo
21:00 - 00:10LHR-PNH
21h 10m2 stops
£561China Southern
Find Deal
Sat, 11 Oct - Thu, 23 Oct
Logo
08:00 - 18:15PNH-LHR
17h 15m1 stop
Logo
21:10 - 10:40LHR-PNH
30h 30m1 stop
£583
Find Deal
Thu, 6 Nov - Fri, 7 Nov
Air China Logo
00:20 - 20:30PNH-LHR
26h 10m1 stop
Air China Logo
20:25 - 11:10LHR-PNH
32h 45m2 stops
£608Air China
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Thu, 21 Aug - Tue, 2 Sep
Air China Logo
00:20 - 20:30PNH-LHR
26h 10m1 stop
Air China Logo
20:25 - 11:10LHR-PNH
32h 45m2 stops
£611Air China
Find Deal
Thu, 21 Aug - Tue, 2 Sep
Logo
00:10 - 15:00PNH-LGW
20h 50m1 stop
Logo
05:45 - 18:15LGW-PNH
30h 30m3 stops
£632
Find Deal
Wed, 13 Aug - Thu, 21 Aug
Qatar Airways Logo
17:10 - 07:20PNH-LHR
21h 10m2 stops
Qatar Airways Logo
08:40 - 15:25LHR-PNH
23h 45m2 stops
£716Qatar Airways
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Fri, 19 Dec - Fri, 2 Jan

Air China flights from Phnom Penh to London

Our best Air China deals on Phnom Penh to London flight tickets
Air China
21 Aug
PNH00:20Phnom Penh Pochentong
26h 10m
1 stop
LHR20:30London Heathrow
2 Sept
LHR20:25London Heathrow
32h 45m
2 stops
PNH11:10Phnom Penh Pochentong
£608
Find similar
Air China
21 Aug
PNH00:20Phnom Penh Pochentong
26h 10m
1 stop
LHR20:30London Heathrow
2 Sept
LHR20:25London Heathrow
32h 45m
2 stops
PNH11:10Phnom Penh Pochentong
£611
Find similar
Air China
18 Dec
PNH00:25Phnom Penh Pochentong
24h 25m
1 stop
LHR17:50London Heathrow
2 Jan
LHR17:40London Heathrow
22h 30m
1 stop
PNH23:10Phnom Penh Pochentong
£620
Find similar

China Southern flights from Phnom Penh to London

Our best China Southern deals on Phnom Penh to London flight tickets
China Southern
11 Oct
PNH08:00Phnom Penh Pochentong
17h 00m
1 stop
LHR19:00London Heathrow
23 Oct
LHR22:10London Heathrow
30h 30m
1 stop
PNH10:40Phnom Penh Pochentong
£558
Find similar
China Southern
11 Oct
PNH08:00Phnom Penh Pochentong
17h 00m
1 stop
LHR19:00London Heathrow
23 Oct
LHR21:00London Heathrow
21h 10m
2 stops
PNH00:10Phnom Penh Pochentong
£561
Find similar
China Southern
22 Aug
PNH15:35Phnom Penh Pochentong
56h 30m
2 stops
LHR18:05London Heathrow
2 Sept
LHR22:10London Heathrow
30h 30m
1 stop
PNH10:40Phnom Penh Pochentong
£570
Find similar

momondo 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, momondo users made 279,928 searches. Data last updated 1 August 2025.
Use the filters below to find and compare flights from Phnom Penh to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Phnom PenhLondon

PNH - LGW

PNHLGW

Phnom Penh Pochentong

Fri 22/8

12:40-15:00

3 stops32h 20m

London Gatwick

Tue 2/9

18:00-23:15

1 stop23h 15m

£518

Phnom PenhLondon

PNH - LGW

PNHLGW

Phnom Penh Pochentong

Thu 18/12

00:15-14:00

1 stop20h 45m

London Gatwick

Fri 2/1

17:00-23:15

1 stop23h 15m

£524

Phnom PenhLondon

PNH - LGW

PNHLGW

Phnom Penh Pochentong

Thu 18/12

00:15-06:30

1 stop37h 15m

London Gatwick

Fri 2/1

17:00-10:00

3 stops58h 00m

£529

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Sat 11/10

08:00-19:00

1 stop17h 00m

London Heathrow

Thu 23/10

22:10-10:40

1 stop30h 30m

£558

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Sat 11/10

08:00-19:00

1 stop17h 00m

London Heathrow

Thu 23/10

21:00-00:10

2 stops21h 10m

£561

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Thu 6/11

08:00-18:15

1 stop17h 15m

London Heathrow

Fri 7/11

21:10-10:40

1 stop30h 30m

£583

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Thu 21/8

00:20-20:30

1 stop26h 10m

London Heathrow

Tue 2/9

20:25-11:10

2 stops32h 45m

£608

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Thu 21/8

00:20-20:30

1 stop26h 10m

London Heathrow

Tue 2/9

20:25-11:10

2 stops32h 45m

£611

Phnom PenhLondon

PNH - LGW

PNHLGW

Phnom Penh Pochentong

Wed 13/8

00:10-15:00

1 stop20h 50m

London Gatwick

Thu 21/8

05:45-18:15

3 stops30h 30m

£632

Phnom PenhLondon

PNH - LHR

PNHLHR

Phnom Penh Pochentong

Fri 19/12

17:10-07:20

2 stops21h 10m

London Heathrow

Fri 2/1

08:40-15:25

2 stops23h 45m

£716

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to London from

How to get the cheapest flight ticket from Phnom Penh to London

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Phnom Penh and London?

What is the cheapest month to fly to London?

The cheapest month to fly to London from Phnom Penh is in November. Flight prices, which tend to average around £550, are often lower during this time because this is during the off-season. The month of March is another great option to travel to London, with average flight prices from Phnom Penh averaging around £583.

What is the cheapest day to depart on your flight to London?

Our data shows that Sunday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £583. When flying out on a Wednesday, the most expensive travel day of the week, you can expect to see flight prices from Phnom Penh to London for around £858.

What is the cheapest time of day to depart on your flight to London?

The cheapest time of day to fly to London is in the afternoon when flights can be purchased for as low as £641. Flights in the evening are often more expensive, with an average ticket price of £752.

How far in advance should I book a flight to London?

You are more likely to see cheaper flights to London from Phnom Penh when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around £794 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Phnom Penh for as low as £615 on momondo.

Can stopping save me money on Phnom Penh to London flights?

You could potentially save up to 13% on your flight if you consider stops on a Phnom Penh to London flight.

How have Phnom Penh to London flight prices changed over time?

As of August 2025, prices for Phnom Penh to London flights are approximately 39% cheaper when compared to flights at the same time last year.

When to book flights from Phnom Penh to London

Are you open to changing your travel dates? Check out the ideal times to fly from Phnom Penh to London according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap Phnom Penh to London (PNH to LON) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Phnom Penh to London

Best price found

£247

Fastest flight time

15h 55m

Direct flights

None

Airports in London

4 airports
The best one-way flight to London from Phnom Penh in the past 72 hours is £247. The best return flight deal from Phnom Penh to London found on momondo in the last 72 hours is £518.
The fastest flight from Phnom Penh to London takes 15h 55m
There are no direct flights from Phnom Penh to London. Popular non-direct routes for this connection are Phnom Penh Pochentong Airport - London Gatwick Airport, Phnom Penh Pochentong Airport - London Stansted Airport and Phnom Penh Pochentong Airport - London Heathrow Airport.
There are 4 airports near London: London City (LCY), London Heathrow (LHR), London Stansted (STN), London Gatwick (LGW)
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  • How far is Phnom Penh Pochentong to London by plane?

    London is 6219.7 mi away from Phnom Penh Pochentong. Typically, this will take 17h 00m by plane in normal conditions.

  • When did momondo last update prices for flights from Phnom Penh Pochentong Airport to London?

    Prices for flights from Phnom Penh Pochentong Airport to London were last updated today.

  • How old do you have to be to fly from Phnom Penh Pochentong Airport to London?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Phnom Penh Pochentong Airport to London.

  • What documentation or ID do you need to fly to London?

    The travel and health documents you'll need for your trip to London may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Phnom Penh to London?

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Eastbourne
Milton Keynes
Luton
Slough
Southend-on-Sea
Maidstone
Canterbury
Gatwick
Ipswich
Ilford
Dartford
Guildford
Colchester
Worthing
Hounslow
Dover
Winchester
Margate
Chelmsford
Bedford

Why use momondo?

Why should I use momondo to find a flight deal from Phnom Penh to London?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Phnom Penh to London for you.

Can I find flights from Phnom Penh to London with flexible booking policies on momondo?

momondo does allow users to show only those flights to London from Phnom Penh which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Phnom Penh to London?

momondo helps you find the best flight between Phnom Penh and London by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Phnom Penh to London right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Phnom Penh to London flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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Find better results for your trip to the United Kingdom

Fly into one of these airports located in London

Airports listed have a maximum distance of 35.6 mi from London
London City Airport
London Gatwick Airport
London Heathrow Airport
London Luton Airport
London Southend Airport
London Stansted Airport