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Cheap flights from London Heathrow Airport to Phnom Penh from C$ 1,058

This is the cheapest round-trip 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 3/11. 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 (LHR-PNH)

Cheap round-trip flights

SWISS Logo
8:05 p.m. - 8:35 a.m.LHR-PNH
53h 30m2 stops
SWISS Logo
7:40 p.m. - 8:05 a.m.PNH-LHR
19h 25m2 stops
C$ 1,058SWISS
Find Deal
Mon, 3 Nov - Mon, 17 Nov
SWISS Logo
8:05 p.m. - 8:35 a.m.LHR-PNH
53h 30m2 stops
SWISS Logo
7:40 p.m. - 8:05 a.m.PNH-LHR
19h 25m2 stops
C$ 1,062SWISS
Find Deal
Mon, 27 Oct - Mon, 17 Nov
SWISS Logo
8:05 p.m. - 8:35 a.m.LHR-PNH
53h 30m2 stops
SWISS Logo
7:40 p.m. - 1:40 p.m.PNH-LHR
25h 00m3 stops
C$ 1,107SWISS
Find Deal
Mon, 3 Nov - Mon, 17 Nov
Etihad Airways Logo
1:55 p.m. - 6:25 p.m.LHR-PNH
21h 30m1 stop
Etihad Airways Logo
7:55 a.m. - 6:40 a.m.PNH-LHR
29h 45m1 stop
C$ 1,120Etihad Airways
Find Deal
Fri, 28 Nov - Mon, 8 Dec
Etihad Airways Logo
1:55 p.m. - 6:30 a.m.LHR-PNH
33h 35m1 stop
Etihad Airways Logo
7:55 a.m. - 2:30 p.m.PNH-LHR
37h 35m1 stop
C$ 1,191Etihad Airways
Find Deal
Sun, 4 Jan - Tue, 13 Jan
Singapore Airlines Logo
10:05 p.m. - 8:40 a.m.LHR-PNH
28h 35m1 stop
Singapore Airlines Logo
2:05 p.m. - 3:45 p.m.PNH-LHR
31h 40m1 stop
C$ 1,224Singapore Airlines
Find Deal
Thu, 9 Oct - Wed, 22 Oct
Singapore Airlines Logo
11:25 a.m. - 5:40 p.m.LHR-PNH
24h 15m1 stop
Singapore Airlines Logo
6:55 p.m. - 3:45 p.m.PNH-LHR
26h 50m1 stop
C$ 1,263Singapore Airlines
Find Deal
Wed, 10 Sep - Wed, 17 Sep
Logo
8:05 p.m. - 8:40 a.m.LHR-PNH
30h 35m2 stops
Logo
2:05 p.m. - 7:55 a.m.PNH-LHR
23h 50m2 stops
C$ 1,405
Find Deal
Wed, 10 Sep - Wed, 17 Sep
Turkish Airlines Logo
10:35 p.m. - 2:40 p.m.LHR-PNH
33h 05m2 stops
Turkish Airlines Logo
7:15 p.m. - 9:55 a.m.PNH-LHR
21h 40m2 stops
C$ 1,706Turkish Airlines
Find Deal
Tue, 23 Dec - Mon, 19 Jan
Turkish Airlines Logo
8:00 p.m. - 2:40 p.m.LHR-PNH
35h 40m2 stops
Turkish Airlines Logo
7:15 p.m. - 2:55 p.m.PNH-LHR
26h 40m2 stops
C$ 1,746Turkish Airlines
Find Deal
Tue, 23 Dec - Mon, 19 Jan

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
28 Nov
LHR1:55 p.m.London Heathrow
21h 30m
1 stop
PNH6:25 p.m.Phnom Penh Pochentong
8 Dec
PNH7:55 a.m.Phnom Penh Pochentong
29h 45m
1 stop
LHR6:40 a.m.London Heathrow
C$ 1,120
Find similar
Etihad Airways
4 Jan
LHR1:55 p.m.London Heathrow
33h 35m
1 stop
PNH6:30 a.m.Phnom Penh Pochentong
13 Jan
PNH7:55 a.m.Phnom Penh Pochentong
37h 35m
1 stop
LHR2:30 p.m.London Heathrow
C$ 1,191
Find similar
Etihad Airways
23 Oct
LHR8:55 p.m.London Heathrow
28h 00m
1 stop
PNH6:55 a.m.Phnom Penh Pochentong
1 Nov
PNH7:50 p.m.Phnom Penh Pochentong
23h 15m
1 stop
LHR12:05 p.m.London Heathrow
C$ 1,227
Find similar

Singapore Airlines flights from London Heathrow Airport to Phnom Penh

Our best Singapore Airlines deals on London Heathrow Airport to Phnom Penh flight tickets
Singapore Airlines
9 Oct
LHR10:05 p.m.London Heathrow
28h 35m
1 stop
PNH8:40 a.m.Phnom Penh Pochentong
22 Oct
PNH2:05 p.m.Phnom Penh Pochentong
31h 40m
1 stop
LHR3:45 p.m.London Heathrow
C$ 1,224
Find similar
Singapore Airlines
10 Sep
LHR11:25 a.m.London Heathrow
24h 15m
1 stop
PNH5:40 p.m.Phnom Penh Pochentong
17 Sep
PNH6:55 p.m.Phnom Penh Pochentong
26h 50m
1 stop
LHR3:45 p.m.London Heathrow
C$ 1,263
Find similar
Singapore Airlines
5 Nov
LHR10:40 a.m.London Heathrow
24h 50m
1 stop
PNH6:30 p.m.Phnom Penh Pochentong
26 Nov
PNH7:40 p.m.Phnom Penh Pochentong
30h 30m
1 stop
LHR7:10 p.m.London Heathrow
C$ 1,267
Find similar

momondo Fare Finder

 
Customize 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 96,600 searches. Data last updated 20 August 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 3/11

8:05 p.m.-8:35 a.m.

2 stops53h 30m

Phnom Penh Pochentong

Mon 17/11

7:40 p.m.-8:05 a.m.

2 stops19h 25m

C$ 1,058

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Mon 27/10

8:05 p.m.-8:35 a.m.

2 stops53h 30m

Phnom Penh Pochentong

Mon 17/11

7:40 p.m.-8:05 a.m.

2 stops19h 25m

C$ 1,062

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Mon 3/11

8:05 p.m.-8:35 a.m.

2 stops53h 30m

Phnom Penh Pochentong

Mon 17/11

7:40 p.m.-1:40 p.m.

3 stops25h 00m

C$ 1,107

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Fri 28/11

1:55 p.m.-6:25 p.m.

1 stop21h 30m

Phnom Penh Pochentong

Mon 8/12

7:55 a.m.-6:40 a.m.

1 stop29h 45m

C$ 1,120

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Sun 4/1

1:55 p.m.-6:30 a.m.

1 stop33h 35m

Phnom Penh Pochentong

Tue 13/1

7:55 a.m.-2:30 p.m.

1 stop37h 35m

C$ 1,191

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Thu 9/10

10:05 p.m.-8:40 a.m.

1 stop28h 35m

Phnom Penh Pochentong

Wed 22/10

2:05 p.m.-3:45 p.m.

1 stop31h 40m

C$ 1,224

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Wed 10/9

11:25 a.m.-5:40 p.m.

1 stop24h 15m

Phnom Penh Pochentong

Wed 17/9

6:55 p.m.-3:45 p.m.

1 stop26h 50m

C$ 1,263

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Wed 10/9

8:05 p.m.-8:40 a.m.

2 stops30h 35m

Phnom Penh Pochentong

Wed 17/9

2:05 p.m.-7:55 a.m.

2 stops23h 50m

C$ 1,405

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Tue 23/12

10:35 p.m.-2:40 p.m.

2 stops33h 05m

Phnom Penh Pochentong

Mon 19/1

7:15 p.m.-9:55 a.m.

2 stops21h 40m

C$ 1,706

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Tue 23/12

8:00 p.m.-2:40 p.m.

2 stops35h 40m

Phnom Penh Pochentong

Mon 19/1

7:15 p.m.-2:55 p.m.

2 stops26h 40m

C$ 1,746

Flights are sorted by cheapest round-trip 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 cheapest month to fly to Phnom Penh?

The cheapest month to fly to Phnom Penh from London Heathrow Airport is in November. Flight prices, which tend to average around C$ 1,057, are often lower during this time because this is during the off-season. If you aren’t able to travel to Phnom Penh during the month of November, then flying in May is also cheap. Prices for this month can be found on momondo for an average of C$ 1,093.

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 C$ 1,311 when searching weeks out. 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 C$ 1,116 on momondo.

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

As of August 2025, prices for London Heathrow Airport to Phnom Penh flights are approximately 22% 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 round-trip 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?

    There are 10032.2 km between London Heathrow and Phnom Penh Pochentong. 14h 30m is a normal flight duration for this route.

  • 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 refreshed on a daily basis.

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for 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 travel and health documents required for your trip to Phnom Penh Pochentong Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Phnom Penh Pochentong Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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 recognizable 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 allows you to filter the results for London to Phnom Penh flights to just show those with flexible booking policies.

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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