S$671 Cheap Flights from London to Phnom Penh

View S$671 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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Cheap Flights from London to Phnom Penh (LHR-PNH)

Prices were available within the past 7 days and start at S$671 for one-way flights and S$938 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

China Southern Airlines
Sun, 31 Aug - Sun, 30 Nov
LHR
London
PNH
Phnom Penh
S$938 Return, found 23 hours ago
S$938
Return
found 23 hours ago
Select China Southern Airlines flight, departing Sun, 31 Aug from London to Phnom Penh, returning Sun, 30 Nov, priced at S$938 found 23 hours ago
China Eastern Airlines
Sun, 31 Aug - Sun, 30 Nov
LHR
London
PNH
Phnom Penh
S$1,174 Return, found 23 hours ago
S$1,174
Return
found 23 hours ago
Select China Eastern Airlines flight, departing Sun, 31 Aug from London to Phnom Penh, returning Sun, 30 Nov, priced at S$1,174 found 23 hours ago
Vietnam Airlines
Sun, 31 Aug - Sun, 30 Nov
LHR
London
PNH
Phnom Penh
S$1,309 Return, found 23 hours ago
S$1,309
Return
found 23 hours ago
Select Vietnam Airlines flight, departing Sun, 31 Aug from London to Phnom Penh, returning Sun, 30 Nov, priced at S$1,309 found 23 hours ago
Etihad Airways
Sat, 14 Mar - Fri, 27 Mar
LHR
London
PNH
Phnom Penh
S$1,310 Return, found 21 hours ago
S$1,310
Return
found 21 hours ago
Select Etihad Airways flight, departing Sat, 14 Mar from London to Phnom Penh, returning Fri, 27 Mar, priced at S$1,310 found 21 hours ago
Austrian Airlines
Sat, 30 Aug - Sun, 14 Sep
LHR
London
PNH
Phnom Penh
S$1,319 Return, found 4 days ago
S$1,319
Return
found 4 days ago
Select Austrian Airlines flight, departing Sat, 30 Aug from London to Phnom Penh, returning Sun, 14 Sep, priced at S$1,319 found 4 days ago
Etihad Airways
Sat, 14 Mar - Fri, 27 Mar
LHR
London
PNH
Phnom Penh
S$1,336 Return, found 21 hours ago
S$1,336
Return
found 21 hours ago
Select Etihad Airways flight, departing Sat, 14 Mar from London to Phnom Penh, returning Fri, 27 Mar, priced at S$1,336 found 21 hours ago
Austrian Airlines
Sat, 30 Aug - Sun, 14 Sep
LHR
London
PNH
Phnom Penh
S$1,340 Return, found 4 days ago
S$1,340
Return
found 4 days ago
Select Austrian Airlines flight, departing Sat, 30 Aug from London to Phnom Penh, returning Sun, 14 Sep, priced at S$1,340 found 4 days ago
Singapore Airlines
Sat, 14 Mar - Fri, 27 Mar
LHR
London
PNH
Phnom Penh
S$1,427 Return, found 21 hours ago
S$1,427
Return
found 21 hours ago
Select Singapore Airlines flight, departing Sat, 14 Mar from London to Phnom Penh, returning Fri, 27 Mar, priced at S$1,427 found 21 hours ago
China Southern Airlines
Sat, 14 Mar - Fri, 27 Mar
LHR
London
PNH
Phnom Penh
S$1,446 Return, found 21 hours ago
S$1,446
Return
found 21 hours ago
Select China Southern Airlines flight, departing Sat, 14 Mar from London to Phnom Penh, returning Fri, 27 Mar, priced at S$1,446 found 21 hours ago
Lufthansa
Sat, 30 Aug - Sun, 14 Sep
LHR
London
PNH
Phnom Penh
S$1,496 Return, found 4 days ago
S$1,496
Return
found 4 days ago
Select Lufthansa flight, departing Sat, 30 Aug from London to Phnom Penh, returning Sun, 14 Sep, priced at S$1,496 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 S$705 - S$1,483 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
Asiana Airlines, Austrian Airlines, Cathay Pacific, China Eastern Airlines, China Southern Airlines, EVA Airways, Etihad Airways, KLM, Korean Air, Malaysia Airlines, Singapore Airlines, Thai Airways International, Vietnam Airlines
Return price
S$937
Distance
9976 km

Perfect flights from London to Phnom Penh

Your Journey from London to Phnom Penh

Start your unforgettable journey with Expedia. Our broad selection of flights from London to Phnom Penh caters to every travel need. Whether you're yearning for a romantic escape, a solo adventure, or a cultural immersion, we've got you covered.
 

Choosing Your Ideal Flight

With Expedia, you have access to a wide range of airlines, including Etihad Airways, China Eastern Airlines, Swiss International Air Lines, Lufthansa, China Southern Airlines, Austrian Airlines, Vietnam Airlines, Malaysia Airlines, Singapore Airlines, China Airlines. Our selection of flights from Heathrow to Phnom Penh Intl. caters to every traveler's requirements, ensuring your journey aligns with your schedule. With options from 20 airlines, you're bound to find the perfect flight.
 

Maximizing Value with London to Phnom Penh Flights

Experience the joy of finding cheap flights from Heathrow to Phnom Penh Intl. that fit your budget. Keep an eye out for our special deals and discounts, and check our flexible one-way fares from S$671 and roundtrip prices from S$938*.
 

Pre-Flight Essentials

Ensure a smooth journey from London to Phnom Penh with Expedia. From information about check-in times and in-flight amenities to guidance on baggage policies, we provide all the essentials to prepare you for your flight.
 

Experience the Vibrant Phnom Penh

Picture yourself stepping off the plane in Phnom Penh and immersing yourself in the unique atmosphere of . From local markets to cultural festivals, each city offers its distinct charm. Make the most of your trip by exploring local attractions and indulging in the local cuisine. With Expedia, explore all this and more, tailored to your budget.
 

Added Convenience on Your London to Phnom Penh Flight

Traveling with Expedia is more than just a flight. We offer details about in-flight amenities, baggage policies, and more to ensure a smooth and hassle-free journey. Choose from our variety of airlines and embark on a memorable journey from London to Phnom Penh.
 

Beyond the Flight – Exploring Phnom Penh

With Expedia, your adventure extends beyond the flight. Explore Phnom Penh at your own pace by renting a car or booking a hotel. Discover hidden gems off the beaten path and create unforgettable memories.
 

Book Your Flight from London to Phnom Penh with Confidence

Planning your next great adventure is a breeze with Expedia. Our user-friendly platform, unbeatable prices, and round-the-clock customer support make your travel experience seamless and stress-free. Embark on your journey from London to Phnom Penh with confidence. Book your travel arrangements with Expedia today.
 
*Note: Prices may vary based on availability and are subject to change.

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 S$938. 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.

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