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Cheap flights from Phnom Penh to London from £240

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 10/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap return flights

These are some of the best return flight deals from Phnom Penh to London that have been recently found on momondo from popular airlines, departing in the coming months.
China Eastern Logo
12:40 - 18:40PNH-LHR
36h 00m2 stops
China Eastern Logo
21:20 - 11:35LHR-PNH
32h 15m2 stops
£466China Eastern
Find Deal
Sat, 24 May - Wed, 4 Jun
China Eastern Logo
12:40 - 18:40PNH-LHR
36h 00m2 stops
China Eastern Logo
21:20 - 11:35LHR-PNH
32h 15m3 stops
£485China Eastern
Find Deal
Thu, 22 May - Mon, 26 May
China Southern Logo
15:35 - 19:00PNH-LHR
33h 25m1 stop
China Southern Logo
21:00 - 10:40LHR-PNH
31h 40m2 stops
£491China Southern
Find Deal
Thu, 12 Jun - Thu, 19 Jun
China Southern Logo
12:05 - 19:00PNH-LHR
36h 55m1 stop
China Southern Logo
21:00 - 10:40LHR-PNH
31h 40m2 stops
£495China Southern
Find Deal
Sat, 24 May - Wed, 4 Jun
Shenzhen Airlines Logo
12:15 - 20:00PNH-LHR
37h 45m1 stop
Shenzhen Airlines Logo
22:05 - 11:10LHR-PNH
31h 05m1 stop
£526Shenzhen Airlines
Find Deal
Sat, 24 May - Wed, 4 Jun
Shenzhen Airlines Logo
12:15 - 20:00PNH-LHR
37h 45m1 stop
Shenzhen Airlines Logo
22:05 - 11:10LHR-PNH
31h 05m1 stop
£528Shenzhen Airlines
Find Deal
Sat, 21 Jun - Sun, 6 Jul
 Logo
00:20 - 20:30PNH-LHR
26h 10m1 stop
 Logo
22:05 - 11:10LHR-PNH
31h 05m1 stop
Sun, 8 Jun - Mon, 16 Jun
 Logo
00:20 - 20:30PNH-LHR
26h 10m1 stop
 Logo
22:05 - 11:10LHR-PNH
31h 05m1 stop
Sun, 8 Jun - Mon, 16 Jun
Air China Logo
00:20 - 20:30PNH-LHR
26h 10m1 stop
Air China Logo
20:25 - 11:10LHR-PNH
32h 45m2 stops
£564Air China
Find Deal
Sun, 8 Jun - Mon, 16 Jun
Air China Logo
12:15 - 20:30PNH-LHR
38h 15m2 stops
Air China Logo
17:40 - 23:10LHR-PNH
22h 30m1 stop
£1,074Air China
Find Deal
Sat, 4 Oct - Wed, 10 Dec

Emirates flights from Phnom Penh to London Heathrow Airport

Our best Emirates deals on Phnom Penh to London Heathrow Airport flight tickets
Emirates
1 Aug
PNH20:50Phnom Penh Pochentong
25h 20m
2 stops
LHR16:10London Heathrow
7 Sept
LHR20:40London Heathrow
37h 55m
2 stops
PNH16:35Phnom Penh Pochentong
Emirates
4 Oct
PNH20:50Phnom Penh Pochentong
23h 35m
2 stops
LHR14:25London Heathrow
7 Dec
LHR20:20London Heathrow
37h 15m
2 stops
PNH16:35Phnom Penh Pochentong
Emirates
10 Oct
PNH20:50Phnom Penh Pochentong
21h 35m
2 stops
LHR12:25London Heathrow
9 Dec
LHR20:20London Heathrow
37h 15m
2 stops
PNH16:35Phnom Penh Pochentong

China Southern flights from Phnom Penh to London Heathrow Airport

Our best China Southern deals on Phnom Penh to London Heathrow Airport flight tickets
China Southern
12 Jun
PNH15:35Phnom Penh Pochentong
33h 25m
1 stop
LHR19:00London Heathrow
19 Jun
LHR21:00London Heathrow
31h 40m
2 stops
PNH10:40Phnom Penh Pochentong
China Southern
24 May
PNH12:05Phnom Penh Pochentong
36h 55m
1 stop
LHR19:00London Heathrow
4 Jun
LHR21:00London Heathrow
31h 40m
2 stops
PNH10:40Phnom Penh Pochentong
China Southern
12 Jun
PNH15:35Phnom Penh Pochentong
33h 25m
1 stop
LHR19:00London Heathrow
19 Jun
LHR22:10London Heathrow
34h 20m
1 stop
PNH14:30Phnom Penh Pochentong

See travel insights to London from

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

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 cheapest month to fly to London Heathrow Airport?

In general, October is the cheapest month to fly from Phnom Penh to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £594. The month of March is another great option to travel to London Heathrow Airport, with average flight prices from Phnom Penh averaging around £646.

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

On average, the least expensive day to fly to London Heathrow Airport from Phnom Penh is on a Monday. momondo users have found tickets for Monday departures for as low as £0. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Saturday is £821.

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

According to our data, the cheapest time of day to fly to London Heathrow Airport is at midday. momondo users have found flights departing from Phnom Penh to London Heathrow Airport at midday for as low as £0. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are £1,032 on average. Flights to London Heathrow Airport from Phnom Penh in the afternoon are generally more expensive because this time of day is more convenient for travellers’ schedules.

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

You are more likely to see cheaper flights to London Heathrow Airport from Phnom Penh when booking 5 weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around £777 when searching 5 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Phnom Penh for as low as £604 on momondo.

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

As of April 2025, prices for Phnom Penh to London Heathrow Airport flights are approximately 10% cheaper when compared to flights at the same time last year.

When to book flights from Phnom Penh to London Heathrow Airport

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

Cheap Phnom Penh to London Heathrow Airport (PNH to LHR) flight deals and tips

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

Best price found

£240

Fastest flight time

15h 30m

Direct flights

None
The best one-way flight to London Heathrow Airport from Phnom Penh in the past 72 hours is £240. The best return flight deal from Phnom Penh to London Heathrow Airport found on momondo in the last 72 hours is £466.
The fastest flight from Phnom Penh to London Heathrow Airport takes 15h 30m
There are no direct flights from Phnom Penh to London Heathrow Airport. Popular non-direct route for this connection is Phnom Penh Pochentong Airport - London Heathrow Airport.

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

    Phnom Penh Pochentong and London Heathrow are 6233.8 mi apart from one another. Flights usually cover this in 15h 30m, depending on flying conditions and air traffic around both airports.

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

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

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

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

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

    The travel and health documents you'll need for your trip to London Heathrow Airport 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 Heathrow Airport. 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 Heathrow Airport?


Best airlines flying from Phnom Penh to London Heathrow Airport

Compare and see reviews for airlines that fly from Phnom Penh to London Heathrow Airport with momondo
Airline
Rating
Free Cancellation
Price
China SouthernPriceFrom £485Free CancellationRating
7.5
96 reviews
Search China Southern flights

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Why use momondo?

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

It is quick and easy to find Phnom Penh to London flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to London that suits 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 provides multiple filters to help you find the best flight to London from Phnom Penh. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Price alerts on flights to London from Phnom Penh are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.


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