Cheap Flights from London (LHR) to Phnom Penh (PNH) from HK$4,120~

View HK$4,120 flight on Sun, 5 Oct 2025Opens in a new window

Popular airlines from Heathrow Airport (LHR) to Phnom Penh Intl. Airport (PNH)

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Find Cheap Flights from London (LHR) to Phnom Penh (PNH)

Prices were available within the past 7 days and start at HK$4,120 for one-way flights and HK$6,372 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Etihad Airways
Sun, 5 Oct - Sat, 11 Oct
LHR
London
PNH
Phnom Penh
HK$6,372 Return, found 3 days ago
HK$6,372
Return
found 3 days ago
Select Etihad Airways flight, departing Sun, 5 Oct from London to Phnom Penh, returning Sat, 11 Oct, priced at HK$6,372 found 3 days ago
China Southern Airlines
Tue, 3 Mar - Thu, 19 Mar
LHR
London
PNH
Phnom Penh
HK$6,481 Return, found 4 days ago
HK$6,481
Return
found 4 days ago
Select China Southern Airlines flight, departing Tue, 3 Mar from London to Phnom Penh, returning Thu, 19 Mar, priced at HK$6,481 found 4 days ago
China Southern Airlines
Thu, 9 Oct - Fri, 17 Oct
LHR
London
PNH
Phnom Penh
HK$6,907 Return, found 1 day ago
HK$6,907
Return
found 1 day ago
Select China Southern Airlines flight, departing Thu, 9 Oct from London to Phnom Penh, returning Fri, 17 Oct, priced at HK$6,907 found 1 day ago
Shenzhen Airlines
Sat, 23 Aug - Tue, 2 Sep
LHR
London
PNH
Phnom Penh
HK$7,038 Return, found 2 days ago
HK$7,038
Return
found 2 days ago
Select Shenzhen Airlines flight, departing Sat, 23 Aug from London to Phnom Penh, returning Tue, 2 Sep, priced at HK$7,038 found 2 days ago
Singapore Airlines
Sun, 5 Oct - Sat, 11 Oct
LHR
London
PNH
Phnom Penh
HK$7,460 Return, found 3 days ago
HK$7,460
Return
found 3 days ago
Select Singapore Airlines flight, departing Sun, 5 Oct from London to Phnom Penh, returning Sat, 11 Oct, priced at HK$7,460 found 3 days ago
Swiss International Air Lines
Tue, 3 Mar - Thu, 19 Mar
LHR
London
PNH
Phnom Penh
HK$7,566 Return, found 4 days ago
HK$7,566
Return
found 4 days ago
Select Swiss International Air Lines flight, departing Tue, 3 Mar from London to Phnom Penh, returning Thu, 19 Mar, priced at HK$7,566 found 4 days ago
Lufthansa
Thu, 9 Oct - Fri, 17 Oct
LHR
London
PNH
Phnom Penh
HK$7,811 Return, found 1 day ago
HK$7,811
Return
found 1 day ago
Select Lufthansa flight, departing Thu, 9 Oct from London to Phnom Penh, returning Fri, 17 Oct, priced at HK$7,811 found 1 day ago
Vietnam Airlines
Sun, 5 Oct - Sat, 11 Oct
LHR
London
PNH
Phnom Penh
HK$8,515 Return, found 3 days ago
HK$8,515
Return
found 3 days ago
Select Vietnam Airlines flight, departing Sun, 5 Oct from London to Phnom Penh, returning Sat, 11 Oct, priced at HK$8,515 found 3 days ago
Emirates
Tue, 3 Mar - Thu, 19 Mar
LHR
London
PNH
Phnom Penh
HK$9,029 Return, found 4 days ago
HK$9,029
Return
found 4 days ago
Select Emirates flight, departing Tue, 3 Mar from London to Phnom Penh, returning Thu, 19 Mar, priced at HK$9,029 found 4 days ago
China Eastern Airlines
Tue, 3 Mar - Thu, 19 Mar
LHR
London
PNH
Phnom Penh
HK$9,123 Return, found 4 days ago
HK$9,123
Return
found 4 days ago
Select China Eastern Airlines flight, departing Tue, 3 Mar from London to Phnom Penh, returning Thu, 19 Mar, priced at HK$9,123 found 4 days ago

Find the cheapest month to fly from London (LHR) to Phnom Penh (PNH)

November is typically the cheapest month to fly

From HK$4,314 - HK$9,041 per traveller.

Graph displaying average flight prices per month

London to Phnom Penh route information
Origin airport
Heathrow
Destination airport
Phnom Penh Intl.
Return price
HK$6,372
Distance
9976 km

Flights from London to Phnom Penh

Book cheap flights from London (LHR) to Phnom Penh (PNH) on Expedia.com.hk. Find the best flight deals to destinations around the world for your next leisure or business travel on Expedia.com.hk.

Search for flights from London (LHR) to Phnom Penh (PNH) to find great flight deals suitable to your travel date and time. Expedia.com.hk flight booking search engine is simple to use and looking for cheap flights is as easy as a click of a mouse or on your mobile devices.

Be assured that you’re seeing the best price guaranteed! Our friendly customer service representatives are here to serve you 24 hours day to provide assistance and answer any questions that you may have about booking your London (LHR) to Phnom Penh (PNH) trip. Call us at 3077-4857 (direct number - 24 hours day for English).

Save more when combine your Phnom Penh flight with a hotel for a package deal! Discover additional savings by booking in advance. Now you can find activities in Phnom Penh and things to do in Phnom Penh for your perfect vacation with Expedia Thing to Do.

If you would like to book flights to Phnom Penh more flexibly, many prefer to purchase one-way tickets with options to take different airlines. A one way ticket to Phnom Penh is HK$4,120 now!

 

Frequently asked questions

How much is a flight from Heathrow Airport (LHR) to PNH?
The lowest price advertised for a round-trip flight from Heathrow Airport to Phnom Penh Airport is HK$6,372. But you better act quick. This price is taken from fares available within the last 7 days on Expedia for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Heathrow Airport (LHR) to PNH?
Each airline has a different set of terms and conditions. If you decide to cancel your vacation, visit our Customer Service Portal.
How do I find cheap flights from LHR to PNH that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for Heathrow Airport to Phnom Penh Airport flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Heathrow Airport (LHR) to Phnom Penh Intl. Airport (PNH)?
With around 10,000 kilometers separating Hounslow and Cambodia, your flight will be a long one. Pack wisely and make your trip comfortable. Simple things like an extra pair of socks and a quality travel pillow can make a huge difference.
Which airlines fly direct from LHR to Phnom Penh Intl. Airport (PNH)?
At the moment, no airlines offer direct flights from London Heathrow to Phnom Penh Intl. Airport (PNH). You'll have to book a flight with at least one stop. To score the best connections and price, lock in your fare well in advance.
Are LHR to Phnom Penh Intl. Airport (PNH) flight tickets cheaper when they're purchased at the last minute?
Flight prices are constantly going up and down, so it's no sure thing. While last-minute flight deals between Heathrow Airport and PNH are possible, it also makes sense to monitor prices well before you fly. In fact, some carriers announce their prices up to 12 months before the departure date. Expedia is continuously updating the biggest bargains around, so keep checking back and be ready to book when the price is low.

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