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

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

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

November is typically the cheapest month to fly

From $547 - $1,159 per traveler.

Frequently asked questions

How much does a flight from Heathrow Airport (LHR) to Phnom Penh Intl. Airport (PNH) cost?
Snag a cheap one-way flight or cheap return flight from Heathrow Airport (LHR) to Phnom Penh Intl. Airport (PNH) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Heathrow Airport (LHR) to Phnom Penh Intl. Airport (PNH)?
The cheapest month to fly from LHR to PNH is , when there's less demand. Off-peak season is often when better flight deals are available between these airports.
What is the cheapest airline that flies from Heathrow Airport (LHR) to Phnom Penh Intl. Airport (PNH)?
Expedia's filter tool lets you easily compare travel time, airlines and fares all in one place. Choose your preferences, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest LHR to PNH flight.
How many flights per day from Heathrow Airport (LHR) to Phnom Penh Intl. Airport (PNH)?
There aren't any daily direct flights departing from Heathrow Airport (LHR) to Phnom Penh Intl. Airport (PNH). But you can choose flights with layovers. Filter your search results on Expedia to include one or two stops, and you'll be on your way in no time at all.
What day of the week has the most flights from LHR to PNH?
Generally you'll have the most choice when it comes to flights on a Friday. Tuesdays are often the quietest.* But this can change depending on the airline, time of year and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Heathrow Airport (LHR) to Phnom Penh Intl. Airport (PNH)?
Select a flight from Heathrow Airport (LHR) to Phnom Penh Intl. Airport (PNH) that leaves before 3 PM to reduce the likelihood of delays. Departures after this hour are on average 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Heathrow Airport (LHR) to Phnom Penh Intl. Airport (PNH) last-minute?
Holding off until just before your departure to book your flight from LHR to PNH often results in higher prices. Although you may find some last-minute offers, they're not always guaranteed. Be flexible with your itinerary to maximize your chances of scoring a bargain.
Is it cheaper to book a LHR to PNH flight and hotel package?
Opting for a LHR to PNH flight and hotel package tends to be cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels in one place. Choose from our wide range of stays and then add car rentals, flights and activities to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Heathrow Airport (LHR) to Phnom Penh Intl. Airport (PNH)?
If you booked your LHR to PNH flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the ticket type you purchased, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal if you want more information.

Travel information

Origin airport
Heathrow
Destination airport
Phnom Penh Intl.
Distance
6235 mi

Book with confidence

London to Phnom Penh Flights

The cheapest times to fly from London to Phnom Penh

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from London to Phnom Penh are during the month of . You can find some of the cheapest flights from London to Phnom Penh with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from London to Phnom Penh

Sunday is one of the best days to book for cheap flights from London to Phnom Penh: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from London to Phnom Penh

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from London to Phnom Penh in 2025. You can also book with separate airlines for your outbound and return journeys, from one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap London to Phnom Penh flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your London to Phnom Penh airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

London to Phnom Penh Flights

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*Available to One Key members.