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Cheap flights from London to Phnom Penh from £281

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 18/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from London to Phnom Penh

Cheap return flights

KAYAK's recommended return flight deals from the most popular airlines that fly from London to Phnom Penh.
China Southern Logo
22:10 - 14:30LHR-PNH
34h 20m1 stop
China Southern Logo
12:05 - 19:00PNH-LHR
36h 55m1 stop
£439China Southern
Find Deal
Sat, 3 May - Sat, 10 May
China Southern Logo
22:10 - 10:40LHR-PNH
30h 30m1 stop
China Southern Logo
15:35 - 19:00PNH-LHR
33h 25m1 stop
£440China Southern
Find Deal
Mon, 5 May - Mon, 12 May
Air China Logo
20:25 - 23:05LHR-PNH
20h 40m1 stop
Air China Logo
00:20 - 20:30PNH-LHR
26h 10m1 stop
£564Air China
Find Deal
Sat, 7 Jun - Sat, 21 Jun
Singapore Airlines Logo
20:35 - 08:40LHR-PNH
30h 05m1 stop
Singapore Airlines Logo
18:55 - 15:45PNH-LHR
26h 50m1 stop
£659Singapore Airlines
Find Deal
Thu, 28 Aug - Thu, 18 Sep
Singapore Airlines Logo
09:25 - 08:40LHR-PNH
17h 15m1 stop
Singapore Airlines Logo
18:55 - 15:45PNH-LHR
26h 50m1 stop
£662Singapore Airlines
Find Deal
Fri, 12 Sep - Sun, 21 Sep
Emirates Logo
14:25 - 16:35LHR-PNH
20h 10m2 stops
Emirates Logo
20:50 - 12:25PNH-LHR
21h 35m2 stops
£727Emirates
Find Deal
Mon, 5 May - Mon, 12 May
Emirates Logo
21:10 - 16:35STN-PNH
37h 25m2 stops
Emirates Logo
20:50 - 12:55PNH-STN
22h 05m2 stops
£739Emirates
Find Deal
Mon, 5 May - Mon, 12 May
Cathay Pacific Logo
18:20 - 17:20LHR-PNH
17h 00m1 stop
Cathay Pacific Logo
11:25 - 15:15PNH-LHR
33h 50m1 stop
£761Cathay Pacific
Find Deal
Fri, 20 Jun - Sat, 2 Aug
Cathay Pacific Logo
18:20 - 17:20LHR-PNH
17h 00m1 stop
Cathay Pacific Logo
18:30 - 15:15PNH-LHR
26h 45m1 stop
£769Cathay Pacific
Find Deal
Tue, 8 Jul - Sun, 13 Jul
Air China Logo
22:40 - 23:05LHR-PNH
18h 25m1 stop
Air China Logo
00:20 - 17:45PNH-LHR
23h 25m1 stop
£818Air China
Find Deal
Fri, 19 Sep - Thu, 2 Oct

China Southern flights from London to Phnom Penh

Our best China Southern deals on London to Phnom Penh flight tickets
China Southern
3 May
LHR22:10London Heathrow
34h 20m
1 stop
PNH14:30Phnom Penh Pochentong
10 May
PNH12:05Phnom Penh Pochentong
36h 55m
1 stop
LHR19:00London Heathrow
China Southern
5 May
LHR22:10London Heathrow
30h 30m
1 stop
PNH10:40Phnom Penh Pochentong
12 May
PNH15:35Phnom Penh Pochentong
33h 25m
1 stop
LHR19:00London Heathrow
China Southern
5 May
LHR22:10London Heathrow
20h 00m
1 stop
PNH00:10Phnom Penh Pochentong
27 May
PNH08:00Phnom Penh Pochentong
17h 00m
1 stop
LHR19:00London Heathrow

Shenzhen Airlines flights from London to Phnom Penh

Our best Shenzhen Airlines deals on London to Phnom Penh flight tickets
Shenzhen Airlines
17 May
LHR22:05London Heathrow
31h 05m
1 stop
PNH11:10Phnom Penh Pochentong
27 May
PNH12:15Phnom Penh Pochentong
37h 45m
1 stop
LHR20:00London Heathrow
Shenzhen Airlines
11 May
LHR22:05London Heathrow
31h 05m
1 stop
PNH11:10Phnom Penh Pochentong
1 Jun
PNH12:15Phnom Penh Pochentong
37h 35m
1 stop
LHR19:50London Heathrow
Shenzhen Airlines
7 Jun
LHR22:05London Heathrow
31h 05m
1 stop
PNH11:10Phnom Penh Pochentong
22 Jun
PNH12:15Phnom Penh Pochentong
37h 35m
1 stop
LHR19:50London Heathrow

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 March is another great option to travel to Phnom Penh, with average flight prices from London averaging around £588.

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 £644. 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 £749.

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 £549. At midday is when there is more demand to fly to Phnom Penh, so prices are often more expensive at around £844 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 18 weeks ahead of your departure date. In general, you can expect to find flights to Phnom Penh for around £743 when searching 18 weeks out.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 £657 on momondo.

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

As of April 2025, prices for London to Phnom Penh flights are approximately 2% cheaper 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

£281

Fastest flight time

15h 45m

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 £281. The best return flight deal from London to Phnom Penh found on momondo in the last 72 hours is £439.
The fastest flight from London to Phnom Penh takes 15h 45m
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 15h 45m.

  • 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
Air ChinaPriceFrom £319Free CancellationRating
7.1
83 reviews
Search Air China flights
Shenzhen AirlinesPriceFrom £398Free CancellationRating
6.1
11 reviews
Search Shenzhen Airlines flights
China SouthernPriceFrom £418Free CancellationRating
7.5
94 reviews
Search China Southern flights
China EasternPriceFrom £596Free CancellationRating
7.2
143 reviews
Search China Eastern flights
Singapore AirlinesPriceFrom £619Free CancellationRating
8.1
1,288 reviews
Search Singapore Airlines flights
British AirwaysPriceFrom £671Free CancellationRating
6.6
6,720 reviews
Search British Airways flights
Malaysia AirlinesPriceFrom £673Free CancellationRating
7.3
252 reviews
Search Malaysia Airlines flights
Cathay PacificPriceFrom £686Free CancellationRating
7.5
842 reviews
Search Cathay Pacific flights
Qatar AirwaysPriceFrom £687Free CancellationRating
7.4
3,542 reviews
Search Qatar Airways flights
Vietnam AirlinesPriceFrom £703Free CancellationRating
7.6
192 reviews
Search Vietnam Airlines 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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