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Cheap flights from London Heathrow Airport to Phnom Penh from £423

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 Heathrow Airport to Phnom Penh departing on 12/10. 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 Heathrow Airport to Phnom Penh

Cheap return flights

Etihad Airways Logo
08:50 - 06:30LHR-PNH
14h 40m1 stop
Etihad Airways Logo
07:55 - 06:40PNH-LHR
29h 45m1 stop
£478Etihad Airways
Find Deal
Mon, 24 Nov - Mon, 8 Dec
Etihad Airways Logo
09:30 - 06:55LHR-PNH
15h 25m1 stop
Etihad Airways Logo
08:30 - 18:45PNH-LHR
16h 15m1 stop
£484Etihad Airways
Find Deal
Sun, 5 Oct - Tue, 14 Oct
Etihad Airways Logo
19:20 - 18:25LHR-PNH
16h 05m1 stop
Etihad Airways Logo
07:55 - 12:05PNH-LHR
35h 10m1 stop
£485Etihad Airways
Find Deal
Wed, 12 Nov - Fri, 12 Dec
Etihad Airways Logo
20:55 - 06:55LHR-PNH
28h 00m1 stop
Etihad Airways Logo
08:30 - 15:15PNH-LHR
36h 45m1 stop
£493Etihad Airways
Find Deal
Tue, 7 Oct - Tue, 21 Oct
Etihad Airways Logo
20:55 - 18:25LHR-PNH
14h 30m1 stop
Etihad Airways Logo
19:50 - 14:30PNH-LHR
25h 40m1 stop
£493Etihad Airways
Find Deal
Wed, 24 Dec - Tue, 20 Jan
Etihad Airways Logo
08:50 - 06:30LHR-PNH
14h 40m1 stop
Etihad Airways Logo
07:55 - 06:40PNH-LHR
29h 45m1 stop
£495Etihad Airways
Find Deal
Thu, 20 Nov - Mon, 8 Dec
Etihad Airways Logo
08:50 - 06:30LHR-PNH
14h 40m1 stop
Etihad Airways Logo
07:55 - 06:40PNH-LHR
29h 45m1 stop
£496Etihad Airways
Find Deal
Mon, 23 Feb - Mon, 9 Mar
Etihad Airways Logo
20:55 - 18:25LHR-PNH
14h 30m1 stop
Etihad Airways Logo
07:55 - 06:40PNH-LHR
29h 45m1 stop
£497Etihad Airways
Find Deal
Mon, 23 Feb - Mon, 9 Mar
Etihad Airways Logo
09:30 - 06:55LHR-PNH
15h 25m1 stop
Etihad Airways Logo
08:30 - 18:45PNH-LHR
16h 15m1 stop
£499Etihad Airways
Find Deal
Mon, 13 Oct - Mon, 20 Oct
Multiple Airlines Logo
06:35 - 18:25LHR-PNH
28h 50m2 stops
Multiple Airlines Logo
07:55 - 10:25PNH-LHR
33h 30m2 stops
£689Multiple Airlines
Find Deal
Mon, 24 Nov - Mon, 8 Dec

Etihad Airways flights from London Heathrow Airport to Phnom Penh

Our best Etihad Airways deals on London Heathrow Airport to Phnom Penh flight tickets
Etihad Airways
24 Nov
LHR08:50London Heathrow
14h 40m
1 stop
PNH06:30Phnom Penh Pochentong
8 Dec
PNH07:55Phnom Penh Pochentong
29h 45m
1 stop
LHR06:40London Heathrow
£478
Find similar
Etihad Airways
5 Oct
LHR09:30London Heathrow
15h 25m
1 stop
PNH06:55Phnom Penh Pochentong
14 Oct
PNH08:30Phnom Penh Pochentong
16h 15m
1 stop
LHR18:45London Heathrow
£484
Find similar
Etihad Airways
12 Nov
LHR19:20London Heathrow
16h 05m
1 stop
PNH18:25Phnom Penh Pochentong
12 Dec
PNH07:55Phnom Penh Pochentong
35h 10m
1 stop
LHR12:05London Heathrow
£485
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from London Heathrow Airport 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 17 September 2025.
Use the filters below to find and compare flights from London Heathrow Airport 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

08:50-06:30

1 stop14h 40m

Phnom Penh Pochentong

Mon 8/12

07:55-06:40

1 stop29h 45m

£478

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Sun 5/10

09:30-06:55

1 stop15h 25m

Phnom Penh Pochentong

Tue 14/10

08:30-18:45

1 stop16h 15m

£484

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Wed 12/11

19:20-18:25

1 stop16h 05m

Phnom Penh Pochentong

Fri 12/12

07:55-12:05

1 stop35h 10m

£485

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Tue 7/10

20:55-06:55

1 stop28h 00m

Phnom Penh Pochentong

Tue 21/10

08:30-15:15

1 stop36h 45m

£493

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Wed 24/12

20:55-18:25

1 stop14h 30m

Phnom Penh Pochentong

Tue 20/1

19:50-14:30

1 stop25h 40m

£493

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Thu 20/11

08:50-06:30

1 stop14h 40m

Phnom Penh Pochentong

Mon 8/12

07:55-06:40

1 stop29h 45m

£495

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Mon 23/2

08:50-06:30

1 stop14h 40m

Phnom Penh Pochentong

Mon 9/3

07:55-06:40

1 stop29h 45m

£496

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Mon 23/2

20:55-18:25

1 stop14h 30m

Phnom Penh Pochentong

Mon 9/3

07:55-06:40

1 stop29h 45m

£497

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Mon 13/10

09:30-06:55

1 stop15h 25m

Phnom Penh Pochentong

Mon 20/10

08:30-18:45

1 stop16h 15m

£499

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Mon 24/11

06:35-18:25

2 stops28h 50m

Phnom Penh Pochentong

Mon 8/12

07:55-10:25

2 stops33h 30m

£688

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 Heathrow Airport 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 Heathrow Airport and Phnom Penh?

What is the cheapest month to fly to Phnom Penh?

The month of May is another great option to travel to Phnom Penh, with average flight prices from London Heathrow Airport averaging around £573.

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 £609. 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 £708.

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

Our data shows that the cheapest London Heathrow Airport 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 £519. At midday is when there is more demand to fly to Phnom Penh, so prices are often more expensive at around £799 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 Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Phnom Penh for around £694 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 Heathrow Airport for as low as £587 on momondo.

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

As of September 2025, prices for London Heathrow Airport to Phnom Penh flights are approximately 28% cheaper when compared to flights at the same time last year.

When to book flights from London Heathrow Airport to Phnom Penh

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

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

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

Direct flights

None
There are no direct flights from London Heathrow Airport to Phnom Penh. There are no popular flight routes from London Heathrow Airport to Phnom Penh.
Search flight deals

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

    Phnom Penh Pochentong is 6233.8 mi away from London Heathrow. A reasonable flight in good conditions will take 14h 30m.

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

    Prices for flights from London Heathrow Airport to Phnom Penh Pochentong Airport are updated daily.

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

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

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

    The required travel and health documents for your Phnom Penh Pochentong Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Phnom Penh Pochentong Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

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

Best airlines flying from London Heathrow Airport to Phnom Penh

Compare and see reviews for airlines that fly from London Heathrow Airport to Phnom Penh with momondo
Airline
Rating
Free Cancellation
Price
Shenzhen AirlinesPriceFrom £377Free CancellationRating
7.5
20 reviews
Search Shenzhen Airlines flights
Air ChinaPriceFrom £400Free CancellationRating
7.3
101 reviews
Search Air China flights
China SouthernPriceFrom £422Free CancellationRating
7.5
110 reviews
Search China Southern flights
Etihad AirwaysPriceFrom £510Free CancellationRating
7.4
1,250 reviews
Search Etihad Airways flights
China EasternPriceFrom £555Free CancellationRating
7.2
166 reviews
Search China Eastern flights
Singapore AirlinesPriceFrom £581Free CancellationRating
8.1
1,365 reviews
Search Singapore Airlines flights
Malaysia AirlinesPriceFrom £587Free CancellationRating
7.3
278 reviews
Search Malaysia Airlines flights
British AirwaysPriceFrom £638Free CancellationRating
6.7
7,363 reviews
Search British Airways flights
Vietnam AirlinesPriceFrom £647Free CancellationRating
7.6
201 reviews
Search Vietnam Airlines flights
Cathay PacificPriceFrom £664Free CancellationRating
7.6
993 reviews
Search Cathay Pacific flights

Why use momondo?

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

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 London to Phnom Penh for you.

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

All flight searches from London to Phnom Penh on momondo can be filtered to show those which offer flexible booking policies.

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

Once all potential London to Phnom Penh flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Of course. momondo tracks the price of London to Phnom Penh flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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