Cheap flights from the United Kingdom to Phnom Penh from £854

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from the United Kingdom to Phnom Penh departing on 29/9. 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 the United Kingdom to Phnom Penh

Recent return flight deals from the United Kingdom to Phnom Penh

Enter your travel dates to find the best prices.
British Airways Logo
19:25 - 10:00
LHR
-
PNH
32h 35m
2 stops
British Airways Logo
18:20 - 05:25
PNH
-
LHR
17h 05m
1 stop
£950British Airways
Fri, 9 Oct - Fri, 23 Oct
British Airways Logo
21:30 - 10:00
LHR
-
PNH
30h 30m
1 stop
British Airways Logo
18:20 - 05:25
PNH
-
LHR
17h 05m
1 stop
£1,276British Airways
Fri, 9 Oct - Fri, 23 Oct
British Airways Logo
19:25 - 10:00
LHR
-
PNH
32h 35m
2 stops
British Airways Logo
18:20 - 05:25
PNH
-
LHR
17h 05m
1 stop
£1,815British Airways
Thu, 9 Jul - Thu, 23 Jul
British Airways Logo
21:30 - 10:00
LHR
-
PNH
30h 30m
1 stop
British Airways Logo
18:20 - 05:25
PNH
-
LHR
17h 05m
1 stop
£1,949British Airways
Thu, 9 Jul - Thu, 23 Jul
British Airways Logo
19:25 - 10:00
LHR
-
PNH
32h 35m
2 stops
British Airways Logo
18:20 - 05:25
PNH
-
LHR
17h 05m
1 stop
£2,005British Airways
Fri, 10 Jul - Fri, 24 Jul
British Airways Logo
21:30 - 10:00
LHR
-
PNH
30h 30m
1 stop
British Airways Logo
18:20 - 05:25
PNH
-
LHR
17h 05m
1 stop
£2,235British Airways
Fri, 10 Jul - Fri, 24 Jul

British Airways flights from United Kingdom to Phnom Penh

Our best British Airways deals on United Kingdom to Phnom Penh flight tickets
British Airways
9 Oct
LHR19:25London Heathrow
32h 35m
2 stops
PNH10:00Phnom Penh Pochentong
23 Oct
PNH18:20Phnom Penh Pochentong
17h 05m
1 stop
LHR05:25London Heathrow
£950
British Airways
9 Oct
LHR21:30London Heathrow
30h 30m
1 stop
PNH10:00Phnom Penh Pochentong
23 Oct
PNH18:20Phnom Penh Pochentong
17h 05m
1 stop
LHR05:25London Heathrow
£1,276
British Airways
9 Jul
LHR19:25London Heathrow
32h 35m
2 stops
PNH10:00Phnom Penh Pochentong
23 Jul
PNH18:20Phnom Penh Pochentong
17h 05m
1 stop
LHR05:25London Heathrow
£1,815

momondo Fare Finder

 
Customise your flight search to find flights from United Kingdom 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 10 May 2026.
Use the filters below to find and compare flights from the United Kingdom to Phnom Penh that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Fri 9/10

19:25-10:00

2 stops32h 35m

Phnom Penh Pochentong

Fri 23/10

18:20-05:25

1 stop17h 05m

£950
Fastest return journey

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Fri 9/10

21:30-10:00

1 stop30h 30m

Phnom Penh Pochentong

Fri 23/10

18:20-05:25

1 stop17h 05m

£1,276

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Thu 9/7

19:25-10:00

2 stops32h 35m

Phnom Penh Pochentong

Thu 23/7

18:20-05:25

1 stop17h 05m

£1,815

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Thu 9/7

21:30-10:00

1 stop30h 30m

Phnom Penh Pochentong

Thu 23/7

18:20-05:25

1 stop17h 05m

£1,949

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Fri 10/7

19:25-10:00

2 stops32h 35m

Phnom Penh Pochentong

Fri 24/7

18:20-05:25

1 stop17h 05m

£2,005

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Fri 10/7

21:30-10:00

1 stop30h 30m

Phnom Penh Pochentong

Fri 24/7

18:20-05:25

1 stop17h 05m

£2,235
Cheapest one-way
Fastest single journey

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Tue 29/9

21:30-10:00

1 stop30h 30m

£854

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Wed 22/7

19:25-10:00

2 stops32h 35m

£1,204

LondonPhnom Penh

LHR - PNH

LHRPNH

London Heathrow

Wed 22/7

21:30-10:00

1 stop30h 30m

£1,725

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

See travel insights to Phnom Penh from

How to get the cheapest flight ticket from United Kingdom 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 month of October is another great option to travel to Phnom Penh, with average flight prices from United Kingdom averaging around £365.

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

You are more likely to see cheaper flights to Phnom Penh from United Kingdom when booking weeks ahead of your departure date. In general, you can expect to find flights to Phnom Penh for around £692 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 United Kingdom for as low as £579 on momondo.

Can stopping save me money on United Kingdom to Phnom Penh flights?

You could potentially save up to 22% on your flight if you consider stops on a United Kingdom to Phnom Penh flight.

Cheap United Kingdom to Phnom Penh flight deals and tips

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

Fastest flight time

18h 05m

Direct flights

None
The fastest flight from United Kingdom to Phnom Penh takes 18h 05m
There are no direct flights from United Kingdom to Phnom Penh. There are no popular flight routes from United Kingdom to Phnom Penh.

Frequently asked questions about flying from the United Kingdom to Phnom Penh

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

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

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

  • How old do you have to be to fly from United Kingdom 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 United Kingdom 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.

Best airlines flying from United Kingdom to Phnom Penh

Compare and see reviews for airlines that fly from United Kingdom to Phnom Penh with momondo
Airline
Rating
Free Cancellation
Price
China SouthernPriceFrom £357Free CancellationRating
7.4
151 reviews
Search China Southern flights
Air ChinaPriceFrom £380Free CancellationRating
7.3
149 reviews
Search Air China flights
Shenzhen AirlinesPriceFrom £409Free CancellationRating
7.8
25 reviews
Search Shenzhen Airlines flights
British AirwaysPriceFrom £492Free CancellationRating
6.7
7,968 reviews
Search British Airways flights
Etihad AirwaysPriceFrom £507Free CancellationRating
7.3
1,435 reviews
Search Etihad Airways flights
Singapore AirlinesPriceFrom £554Free CancellationRating
8.2
1,510 reviews
Search Singapore Airlines flights
Malaysia AirlinesPriceFrom £582Free CancellationRating
7.4
307 reviews
Search Malaysia Airlines flights
Qatar AirwaysPriceFrom £675Free CancellationRating
7.4
3,728 reviews
Search Qatar Airways flights
EmiratesPriceFrom £690Free CancellationRating
8.1
3,571 reviews
Search Emirates flights
Thai AirwaysPriceFrom £755Free CancellationRating
7.9
401 reviews
Search Thai Airways flights

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from United Kingdom to Phnom Penh. momondo saves you time and could save you money on your trip.

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

Yes. momondo allows you to filter the results for United Kingdom to Phnom Penh flights to just show those with flexible booking policies.

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

momondo helps you find the best flight between United Kingdom and Phnom Penh by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

If you are not ready to book a flight from United Kingdom to Phnom Penh now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Phnom Penh and let you know when they change.

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