€447 Cheap Flights London to Phnom Penh (LHR-PNH)

View €447 flight on Tue, 7 Oct 2025Opens in a new window

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

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 15% on select hotels after you book a flight*
  • payments icon

    Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheap flights from London to Phnom Penh (LHR-PNH)

Prices were available within the past 7 days and start at €447 for one-way flights and €668 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Etihad Airways
Tue, 7 Oct - Tue, 2 Dec
LHR
London
PNH
Phnom Penh
€668 Return, found 6 hours ago
€668
Return
found 6 hours ago
Select Etihad Airways flight, departing Tue, 7 Oct from London to Phnom Penh, returning Tue, 2 Dec, priced at €668 found 6 hours ago
Lufthansa
Wed, 10 Sep - Wed, 17 Sep
LHR
London
PNH
Phnom Penh
€681 Return, found 1 day ago
€681
Return
found 1 day ago
Select Lufthansa flight, departing Wed, 10 Sep from London to Phnom Penh, returning Wed, 17 Sep, priced at €681 found 1 day ago
Etihad Airways
Mon, 10 Nov - Thu, 20 Nov
LHR
London
PNH
Phnom Penh
€685 Return, found 8 hours ago
€685
Return
found 8 hours ago
Select Etihad Airways flight, departing Mon, 10 Nov from London to Phnom Penh, returning Thu, 20 Nov, priced at €685 found 8 hours ago
Lufthansa
Fri, 7 Nov - Thu, 13 Nov
LHR
London
PNH
Phnom Penh
€697 Return, found 5 days ago
€697
Return
found 5 days ago
Select Lufthansa flight, departing Fri, 7 Nov from London to Phnom Penh, returning Thu, 13 Nov, priced at €697 found 5 days ago
Swiss International Air Lines
Wed, 10 Sep - Wed, 17 Sep
LHR
London
PNH
Phnom Penh
€700 Return, found 1 day ago
€700
Return
found 1 day ago
Select Swiss International Air Lines flight, departing Wed, 10 Sep from London to Phnom Penh, returning Wed, 17 Sep, priced at €700 found 1 day ago
Etihad Airways
Tue, 7 Oct - Tue, 2 Dec
LHR
London
PNH
Phnom Penh
€702 Return, found 6 hours ago
€702
Return
found 6 hours ago
Select Etihad Airways flight, departing Tue, 7 Oct from London to Phnom Penh, returning Tue, 2 Dec, priced at €702 found 6 hours ago
Lufthansa
Fri, 7 Nov - Thu, 13 Nov
LHR
London
PNH
Phnom Penh
€710 Return, found 5 days ago
€710
Return
found 5 days ago
Select Lufthansa flight, departing Fri, 7 Nov from London to Phnom Penh, returning Thu, 13 Nov, priced at €710 found 5 days ago
Etihad Airways
Mon, 10 Nov - Thu, 20 Nov
LHR
London
PNH
Phnom Penh
€719 Return, found 8 hours ago
€719
Return
found 8 hours ago
Select Etihad Airways flight, departing Mon, 10 Nov from London to Phnom Penh, returning Thu, 20 Nov, priced at €719 found 8 hours ago
Singapore Airlines
Tue, 7 Oct - Tue, 2 Dec
LHR
London
PNH
Phnom Penh
€753 Return, found 6 hours ago
€753
Return
found 6 hours ago
Select Singapore Airlines flight, departing Tue, 7 Oct from London to Phnom Penh, returning Tue, 2 Dec, priced at €753 found 6 hours ago
Vietnam Airlines
Tue, 7 Oct - Tue, 2 Dec
LHR
London
PNH
Phnom Penh
€825 Return, found 6 hours ago
€825
Return
found 6 hours ago
Select Vietnam Airlines flight, departing Tue, 7 Oct from London to Phnom Penh, returning Tue, 2 Dec, priced at €825 found 6 hours ago

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

November is typically the cheapest month to fly

From €474 - €993 per traveller.

Graph displaying average flight prices per month

London to Phnom Penh route information
Origin airport
Heathrow
Destination airport
Phnom Penh Intl.
Airlines serving
Air China, Asiana Airlines, British Airways, EVA Airways, Lufthansa, Singapore Airlines, Swiss International Air Lines, Vietnam Airlines
Return price
€668
Distance
9976 km

Perfect flights from London to Phnom Penh

Embark on an unforgettable journey without breaking the bank with Expedia's incredible deals on cheap flights from London to Phnom Penh. Whether you're aching for a romantic escape with your partner, craving an adventurous solo expedition, or yearning to immerse yourself in the local history and culture, we've got you covered.
 
Picture yourself strolling through the streets of , surrounded by breathtaking architecture and absorbing the vibrant atmosphere of this captivating city. Indulge in the mouth-watering local specialties, from tantalizing street food to exquisite fine dining. With Expedia, you can experience all of this and more, without sacrificing your budget.
 
Our flexible Heathrow to Phnom Penh Intl. ticket options cater to your travel preferences, with incredible one-way fares from €447 and roundtrip prices from €668. Whether you're planning a short city break or a longer adventure, our dynamic pricing ensures that you find the best deals for your journey.
 
But the magic doesn't stop there. Expedia offers a range of partner services to enhance your trip. Rent a car at Phnom Penh Intl. and explore and its surrounding areas at your own pace. Discover hidden gems off the beaten path, and create unforgettable memories. We also provide a handpicked selection of accommodations, from charming bed and breakfasts to luxury hotels, ensuring that you have a comfortable and memorable stay.
 
Planning your next great adventure is a breeze with Expedia. Our user-friendly platform, unbeatable prices, and round-the-clock customer support are designed to make your travel experience seamless and stress-free. So, why wait? Book your to travel arrangements today and embark on the journey of a lifetime in Phnom Penh.

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 €668. 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 holiday, 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 kilometres 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.

Explore a world of travel with Expedia

*Available to Expedia members.