471 € London Heathrow to Phnom Penh Cheap Flights

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Flight deals from London Heathrow to Phnom Penh

Looking for a cheap last-minute deal or the best return flight from London Heathrow to Phnom Penh? Find the lowest prices on one-way and return tickets right here.

Phnom Penh.471 € per passenger.Departing Tue, 23 Sep, returning Tue, 7 Oct.Return flight with China Southern.Outbound indirect flight with China Southern, departs from London Heathrow on Tue, 23 Sep, arriving in Phnom Penh.Inbound indirect flight with China Southern, departs from Phnom Penh on Tue, 7 Oct, arriving in London Heathrow.Price includes taxes and charges.From 471 €, select.

Phnom Penh.490 € per passenger.Departing Mon, 1 Dec, returning Tue, 23 Dec.Return flight with China Southern.Outbound indirect flight with China Southern, departs from London Heathrow on Mon, 1 Dec, arriving in Phnom Penh.Inbound indirect flight with China Southern, departs from Phnom Penh on Tue, 23 Dec, arriving in London Heathrow.Price includes taxes and charges.From 490 €, select.

Phnom Penh.505 € per passenger.Departing Tue, 28 Oct, returning Tue, 11 Nov.Return flight with Emirates.Outbound indirect flight with Emirates, departs from London Heathrow on Tue, 28 Oct, arriving in Phnom Penh.Inbound indirect flight with Emirates, departs from Phnom Penh on Tue, 11 Nov, arriving in London Heathrow.Price includes taxes and charges.From 505 €, select.

Phnom Penh.517 € per passenger.Departing Sun, 30 Nov, returning Sat, 28 Feb.Return flight with Air China.Outbound indirect flight with Air China, departs from London Heathrow on Sun, 30 Nov, arriving in Phnom Penh.Inbound indirect flight with Air China, departs from Phnom Penh on Sat, 28 Feb, arriving in London Heathrow.Price includes taxes and charges.From 517 €, select.

Phnom Penh.517 € per passenger.Departing Mon, 22 Sep, returning Mon, 10 Nov.Return flight with Air China.Outbound indirect flight with Air China, departs from London Heathrow on Mon, 22 Sep, arriving in Phnom Penh.Inbound indirect flight with Air China, departs from Phnom Penh on Mon, 10 Nov, arriving in London Heathrow.Price includes taxes and charges.From 517 €, select.

Phnom Penh.517 € per passenger.Departing Mon, 17 Nov, returning Mon, 1 Dec.Return flight with Air China.Outbound indirect flight with Air China, departs from London Heathrow on Mon, 17 Nov, arriving in Phnom Penh.Inbound indirect flight with Air China, departs from Phnom Penh on Mon, 1 Dec, arriving in London Heathrow.Price includes taxes and charges.From 517 €, select.

Phnom Penh.517 € per passenger.Departing Sun, 2 Nov, returning Wed, 19 Nov.Return flight with Air China.Outbound indirect flight with Air China, departs from London Heathrow on Sun, 2 Nov, arriving in Phnom Penh.Inbound indirect flight with Air China, departs from Phnom Penh on Wed, 19 Nov, arriving in London Heathrow.Price includes taxes and charges.From 517 €, select.

Phnom Penh.519 € per passenger.Departing Tue, 28 Oct, returning Tue, 16 Dec.Return flight with Air China.Outbound indirect flight with Air China, departs from London Heathrow on Tue, 28 Oct, arriving in Phnom Penh.Inbound indirect flight with Air China, departs from Phnom Penh on Tue, 16 Dec, arriving in London Heathrow.Price includes taxes and charges.From 519 €, select.

Find the cheapest month to fly from London Heathrow to Phnom Penh

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like London Heathrow to Phnom Penh flights are currently cheapest in December.

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London Heathrow to Phnom Penh: Alternative routes

Compare routes from London Heathrow to Phnom Penh below. You may find an airport to fly into that's cheaper, faster, or easier than Phnom Penh.

London to Phnom Penh: Flight information

The things to know before you go.

Cheapest flight found	471 €
Cheapest month to fly	September

Finding cheap flights from London Heathrow to Phnom Penh: Frequently asked questions

How much are return flights from London Heathrow to Phnom Penh?

The best price we found for a return flight from London Heathrow to Phnom Penh is 471 €. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.

Which airlines fly direct from London Heathrow to Phnom Penh?

Currently, there are no airlines that fly direct from London Heathrow to Phnom Penh. But we found flights with one or more stops from 471 €.

How many flights are there a week from London Heathrow to Phnom Penh?

As of June 2025, there are no flights flying from London Heathrow to Phnom Penh.

When is the cheapest time to fly from London Heathrow to Phnom Penh?

The cheapest month to fly from London Heathrow to Phnom Penh is usually June 2025.

Which upcoming date is cheapest to fly from London Heathrow Airport to Phnom Penh Airport on?

After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from London Heathrow Airport to Phnom Penh Airport on Tuesday, 23 September 2025.

Can I get a direct flight from London Heathrow Airport to Phnom Penh Airport?

No airlines currently offer direct flights between London Heathrow Airport and Phnom Penh Airport. Most routes have one or more stops.

How can I find the best flight deal to Phnom Penh?

We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Phnom Penh but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

When is the best time to book flights to Phnom Penh?

We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Phnom Penh is around 40 days in advance, so don’t leave your flight to the last minute.

Which is the cheapest airline to fly from London Heathrow Airport to Phnom Penh with?

Currently, China Southern offers the cheapest flight tickets to Phnom Penh.

Travelling from London Heathrow Airport (LHR) to Phnom Penh International Airport (PNH): what you need to know

Phnom Penh's timezone is UTC+7, which makes Phnom Penh seven hours ahead of London.
To ensure you get on your LHR to PNH flight, leave plenty of time for things like check-in and baggage drop. Turning up two hours ahead of international departures and one hour before domestic flights is the general travel rule.
Flying during a peak time like July? School holidays and other popular periods can mean longer lines at airport checkpoints. Be extra cautious and get there up to four hours before an international flight and two hours before domestic departures.
Consider adding a stopover when booking your ticket from London Heathrow Airport to Phnom Penh International Airport. Simply uncheck 'Direct flights only' to break up your trip, or perhaps see a new city along the way. Here are some options between LHR and PNH:
- Suvarnabhumi Airport
- Changi International Airport
- Kuala Lumpur International Airport

How to find the cheapest flights from London Heathrow Airport (LHR) to Phnom Penh International Airport (PNH)

The cheapest price we've seen for a one-way London Heathrow Airport to Phnom Penh International Airport flight is 386 €. A round-trip plane ticket is currently 471 €. Depending on the availability when you book, these fares could change.
Don't leave things to the last minute. You're more likely to find cheap tickets from LHR to PNH if you book early. Airlines often offer some fantastic early bird discounts.
Getting cheap flights from London Heathrow Airport to Phnom Penh International Airport is easy if you're flexible with your trip dates. Use the 'Whole month' function to see the lowest fares across each month and bag a great deal.
You don't need to check back in every day to see if fares have dropped when you create a Price Alert. We'll send you an update the moment the price changes on cheap flights from LHR to PNH.
Find the perfect flight for you by using the filters. To see the 'Fastest,' 'Best' or 'Cheapest' flights from London Heathrow Airport to Phnom Penh International Airport, use the 'Sort by' function. You can also filter results by airline, departure and arrival times, and number of stops.

Handy information about London Heathrow Airport (LHR)

68.18% of flights that depart London Heathrow Airport touch down at their destination on schedule.
Central London to London Heathrow Airport is around 31 kilometres. Depending on traffic, it'll take you about 55 minutes to get there if you're catching a cab, ride-sharing or driving.
Expect a trip time of around 1 hour when using public transport.
Booked an early flight from London Heathrow Airport to Phnom Penh International Airport? Avoid the stress of rushing to the terminal (and catch some extra z's) by picking one of these hotels close to LHR:

Arriving at Phnom Penh International Airport (PNH)

Book a hotel near PNH if you're catching a late London Heathrow Airport to Phnom Penh International Airport flight. Pick one of these accommodation options and avoid the hassle of a long transfer:
Explore without limits with a Phnom Penh International Airport rental car. Pick up a set of wheels from Europcar, Avis or Budget and venture far and wide through Phnom Penh and beyond.
To get the best deal, reserve your vehicle from Phnom Penh International Airport around one week ahead.

Getting from Phnom Penh International Airport (PNH) to central Phnom Penh

From Phnom Penh International Airport, Phnom Penh is approximately 11 kilometres away. It takes around 30 minutes to reach the centre by car.

When to fly to Phnom Penh International Airport (PNH)

The quietest month for a flight from London Heathrow Airport to Phnom Penh International Airport is February, while August is the busiest. Choose the best time to go to Phnom Penh based on whether you prefer a more relaxed vibe or a faster pace.
The warmest month in Phnom Penh is March, with the temperature ranging between 23ºC (73ºF) and 38ºC (100ºF). Book your flights from London Heathrow Airport to Phnom Penh International Airport in this month if this is the type of weather you enjoy.
Search for cheap tickets from LHR to PNH in January if you'd rather travel during cooler conditions. Temperatures are at their lowest around then, ranging between 20ºC (68ºF) and 33ºC (91ºF) on average.

Explore more of Cambodia

You've seen Phnom Penh, now it's time to discover other corners of Cambodia. Journey about 193 kilometres south-west to Sihanoukville to tick off its leading attractions. From Ochheuteal Beach to Wat Leu Temple and Wat Krom Temple, you've got a jam-packed schedule ahead.
Battambang is another must-experience destination in Cambodia and is around 257 kilometres north-west of Phnom Penh. No trip is complete without experiencing The Garden of SamDech Sar Kheng, Spean Thmor Chas and សួននាគសន្តិភាព-Dragon Peace Garden.