Cheap flights from London to Phnom Penh from £290

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London to Phnom Penh departing on 30/8. 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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Find the cheapest flights from London to Phnom Penh

Cheap return flights

Air China Logo
17:40 - 23:10LHR-PNH
22h 30m1 stop
Air China Logo
00:25 - 17:50PNH-LHR
24h 25m1 stop
£399Air China
Find Deal
Mon, 24 Nov - Sat, 6 Dec
Air China Logo
17:40 - 23:10LHR-PNH
22h 30m1 stop
Air China Logo
00:25 - 15:55PNH-LHR
22h 30m1 stop
£402Air China
Find Deal
Mon, 24 Nov - Sun, 7 Dec
Air China Logo
20:25 - 23:10LHR-PNH
19h 45m1 stop
Air China Logo
00:25 - 17:50PNH-LHR
24h 25m1 stop
£403Air China
Find Deal
Mon, 3 Nov - Sun, 16 Nov
China Southern Logo
12:00 - 14:30LGW-PNH
20h 30m1 stop
China Southern Logo
15:35 - 06:50PNH-LGW
21h 15m1 stop
£462China Southern
Find Deal
Mon, 22 Sep - Sun, 5 Oct
China Southern Logo
21:30 - 14:35LHR-PNH
34h 05m2 stops
China Southern Logo
15:50 - 18:15PNH-LHR
33h 25m1 stop
£471China Southern
Find Deal
Wed, 29 Oct - Fri, 14 Nov
China Eastern Logo
10:30 - 23:15LGW-PNH
29h 45m1 stop
China Eastern Logo
11:05 - 14:00PNH-LGW
57h 55m2 stops
£538China Eastern
Find Deal
Mon, 10 Nov - Mon, 17 Nov
China Eastern Logo
10:30 - 23:15LGW-PNH
29h 45m1 stop
China Eastern Logo
00:15 - 14:00PNH-LGW
20h 45m1 stop
£545China Eastern
Find Deal
Mon, 17 Nov - Fri, 28 Nov
Singapore Airlines Logo
09:20 - 13:45LGW-PNH
21h 25m1 stop
Singapore Airlines Logo
14:40 - 06:25PNH-LGW
22h 45m1 stop
£561Singapore Airlines
Find Deal
Mon, 17 Nov - Sun, 28 Dec
Emirates Logo
21:10 - 16:35STN-PNH
37h 25m2 stops
Emirates Logo
20:50 - 12:55PNH-STN
22h 05m2 stops
£746Emirates
Find Deal
Tue, 2 Sep - Mon, 8 Sep
Emirates Logo
21:10 - 16:35STN-PNH
37h 25m2 stops
Emirates Logo
20:50 - 18:45PNH-STN
27h 55m2 stops
£767Emirates
Find Deal
Fri, 5 Sep - Mon, 8 Sep

Air China flights from London to Phnom Penh

Our best Air China deals on London to Phnom Penh flight tickets
Air China
24 Nov
LHR17:40London Heathrow
22h 30m
1 stop
PNH23:10Phnom Penh Pochentong
6 Dec
PNH00:25Phnom Penh Pochentong
24h 25m
1 stop
LHR17:50London Heathrow
Air China
24 Nov
LHR17:40London Heathrow
22h 30m
1 stop
PNH23:10Phnom Penh Pochentong
7 Dec
PNH00:25Phnom Penh Pochentong
22h 30m
1 stop
LHR15:55London Heathrow
Air China
3 Nov
LHR20:25London Heathrow
19h 45m
1 stop
PNH23:10Phnom Penh Pochentong
16 Nov
PNH00:25Phnom Penh Pochentong
24h 25m
1 stop
LHR17:50London Heathrow

China Eastern flights from London to Phnom Penh

Our best China Eastern deals on London to Phnom Penh flight tickets
China Eastern
10 Nov
LGW10:30London Gatwick
29h 45m
1 stop
PNH23:15Phnom Penh Pochentong
17 Nov
PNH11:05Phnom Penh Pochentong
57h 55m
2 stops
LGW14:00London Gatwick
China Eastern
17 Nov
LGW10:30London Gatwick
29h 45m
1 stop
PNH23:15Phnom Penh Pochentong
28 Nov
PNH00:15Phnom Penh Pochentong
20h 45m
1 stop
LGW14:00London Gatwick
China Eastern
17 Nov
LGW10:30London Gatwick
40h 30m
2 stops
PNH10:00Phnom Penh Pochentong
28 Nov
PNH00:15Phnom Penh Pochentong
20h 45m
1 stop
LGW14:00London Gatwick

momondo 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, momondo users made 279,928 searches. Data last updated 30 July 2025.
Use the filters below to find and compare flights from London to Phnom Penh that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Mon 24/11

17:40-23:10

1 stop22h 30m

Phnom Penh Pochentong

Sat 6/12

00:25-17:50

1 stop24h 25m

£399

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Mon 24/11

17:40-23:10

1 stop22h 30m

Phnom Penh Pochentong

Sun 7/12

00:25-15:55

1 stop22h 30m

£402

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Mon 3/11

20:25-23:10

1 stop19h 45m

Phnom Penh Pochentong

Sun 16/11

00:25-17:50

1 stop24h 25m

£403

LondonPhnom Penh

LGW - PNH

LGWPNH

London Gatwick

Mon 22/9

12:00-14:30

1 stop20h 30m

Phnom Penh Pochentong

Sun 5/10

15:35-06:50

1 stop21h 15m

£462

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Wed 29/10

21:30-14:35

2 stops34h 05m

Phnom Penh Pochentong

Fri 14/11

15:50-18:15

1 stop33h 25m

£471

LondonPhnom Penh

LGW - PNH

LGWPNH

London Gatwick

Mon 10/11

10:30-23:15

1 stop29h 45m

Phnom Penh Pochentong

Mon 17/11

11:05-14:00

2 stops57h 55m

£538

LondonPhnom Penh

LGW - PNH

LGWPNH

London Gatwick

Mon 17/11

10:30-23:15

1 stop29h 45m

Phnom Penh Pochentong

Fri 28/11

00:15-14:00

1 stop20h 45m

£545

LondonPhnom Penh

LGW - PNH

LGWPNH

London Gatwick

Mon 17/11

09:20-13:45

1 stop21h 25m

Phnom Penh Pochentong

Sun 28/12

14:40-06:25

1 stop22h 45m

£561

LondonPhnom Penh

STN - PNH

STNPNH

London Stansted

Tue 2/9

21:10-16:35

2 stops37h 25m

Phnom Penh Pochentong

Mon 8/9

20:50-12:55

2 stops22h 05m

£746

LondonPhnom Penh

STN - PNH

STNPNH

London Stansted

Fri 5/9

21:10-16:35

2 stops37h 25m

Phnom Penh Pochentong

Mon 8/9

20:50-18:45

2 stops27h 55m

£767

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 Phnom Penh from

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

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 London and Phnom Penh?

What is the cheapest month to fly to Phnom Penh?

The month of September is another great option to travel to Phnom Penh, with average flight prices from London averaging around £554.

What is the cheapest day to depart on your flight to Phnom Penh?

Our data shows that Monday is the least expensive day to fly to Phnom Penh. Tickets to fly out on this day can be as low as £622. Be sure to avoid booking your departure on a Friday as prices are generally higher than usual. According to our data, the average ticket price to Phnom Penh on Friday is £724.

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

Our data shows that the cheapest London to Phnom Penh flights are usually those with departure times in the evening. Our users have found flights to Phnom Penh in the evening for as low as £531. At midday is when there is more demand to fly to Phnom Penh, so prices are often more expensive at around £816 per ticket.

How far in advance should I book a flight to Phnom Penh?

You are more likely to see cheaper flights to Phnom Penh from London when booking weeks ahead of your departure date. In general, you can expect to find flights to Phnom Penh for around £713 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Phnom Penh from London for as low as £614 on momondo.

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

You could potentially save up to 12% on your flight if you consider stops on a London to Phnom Penh flight.

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

As of July 2025, prices for London to Phnom Penh flights are approximately 51% more expensive when compared to flights at the same time last year.

When to book flights from London to Phnom Penh

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

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

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

Best price found

£290

Fastest flight time

15h 25m

Direct flights

None

Airports in Phnom Penh

1 airport
The best one-way flight to Phnom Penh from London in the past 72 hours is £290. The best return flight deal from London to Phnom Penh found on momondo in the last 72 hours is £399.
The fastest flight from London to Phnom Penh takes 15h 25m
There are no direct flights from London to Phnom Penh. Popular non-direct routes for this connection are London Gatwick Airport - Phnom Penh Pochentong Airport, London Heathrow Airport - Phnom Penh Pochentong Airport and London Luton Airport - Phnom Penh Pochentong Airport.
There is 1 airport near Phnom Penh: Phnom Penh Pochentong (PNH)

  • How far is London to Phnom Penh Pochentong by plane?

    London and Phnom Penh Pochentong are 6219.7 mi apart from one another. By plane, this route typically takes 16h 40m.

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

    Prices for flights from London to Phnom Penh Pochentong Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from London to Phnom Penh Pochentong Airport?

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

    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 London to Phnom Penh Pochentong Airport.

  • What documentation or ID do you need to fly to Phnom Penh Pochentong Airport?

    The necessary travel and health documents for your Phnom Penh Pochentong Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

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


Best airlines flying from London to Phnom Penh

Compare and see reviews for airlines that fly from London to Phnom Penh with momondo
Airline
Rating
Free Cancellation
Price
China SouthernPriceFrom £365Free CancellationRating
7.6
104 reviews
Search China Southern flights
Shenzhen AirlinesPriceFrom £385Free CancellationRating
6.8
15 reviews
Search Shenzhen Airlines flights
Air ChinaPriceFrom £426Free CancellationRating
7.3
91 reviews
Search Air China flights
China EasternPriceFrom £516Free CancellationRating
7.2
158 reviews
Search China Eastern flights
Etihad AirwaysPriceFrom £520Free CancellationRating
7.4
1,228 reviews
Search Etihad Airways flights
Singapore AirlinesPriceFrom £569Free CancellationRating
8.1
1,338 reviews
Search Singapore Airlines flights
Malaysia AirlinesPriceFrom £600Free CancellationRating
7.4
270 reviews
Search Malaysia Airlines flights
British AirwaysPriceFrom £652Free CancellationRating
6.6
7,215 reviews
Search British Airways flights
Vietnam AirlinesPriceFrom £662Free CancellationRating
7.5
196 reviews
Search Vietnam Airlines flights
Cathay PacificPriceFrom £678Free CancellationRating
7.6
948 reviews
Search Cathay Pacific flights

Why use momondo?

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

Finding the right flight to Phnom Penh from London is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Phnom Penh quick and easy, saving you time and money.

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

Yes. momondo enables you to select and highlight flights to Phnom Penh from London with this policy.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from London to Phnom Penh.

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

Yes. momondo can track prices for London to Phnom Penh 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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