Cheap flights from Phnom Penh to London Heathrow Airport
PNH — LHR
11 Dec — 18 Dec1
Return
1 adult
Economy
Return
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Phnom Penh Pochentong to London Heathrow are usually found in August or March, booked 73 days in advance, depart on a Wednesday or Tuesday and return on a Monday
Cheap flight deals from Phnom Penh to Heathrow
Discover tips and strategies to find the most affordable flight options for your journey from Phnom Penh (PNH) to Heathrow (LHR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 11 November 2025.
Popular in
February
Cheapest in
August
Average price
£771
Highest demand for flights based on searches. 3% potential increase in price (£18 potential increase over avg. return price).
Best time to book a flight from Phnom Penh to Heathrow
Have a flexible travel schedule? Discover the best time to fly to Heathrow from Phnom Penh with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Phnom Penh to London Heathrow Airport
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How far ahead should I book a flight from Phnom Penh to London Heathrow Airport?
Use this chart to determine the optimal time to book a return flight from Phnom Penh to Heathrow. Price data was last updated on 7 November 2025.
The price you pay for your flight from Phnom Penh to London Heathrow Airport may vary depending on when you book. For the best chance of a lower fare, look to book 73 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest month to book a flight from Phnom Penh to London Heathrow Airport?
Currently, August is the cheapest month in which you can book a flight from Phnom Penh to London Heathrow Airport (average of £501). Flying from Phnom Penh to London Heathrow Airport in April is currently the most expensive (average of £746). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What’s the top stopover airport for flights from Phnom Penh to London Heathrow Airport?
Share of one-stop return flights from Phnom Penh to London Heathrow Airport chosen by Cheapflights users in the past 12 months, using the same stopover each way.
Shanghai (PVG) – chosen by Cheapflights users on 33% of one-stop itineraries from Phnom Penh to London Heathrow Airport on Cheapflights.
What’s the fastest stopover option from Phnom Penh to London Heathrow Airport?
Shortest average travel time for one-stop one-way flights from Phnom Penh to London Heathrow Airport, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.
Flights via Bangkok (BKK) have the shortest average one-way travel time for one-stop routes: 15h 57m.
What’s the fastest stopover option from Phnom Penh to London Heathrow Airport?
Shortest average travel time for one-stop one-way flights from Phnom Penh to London Heathrow Airport, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.
Flights via Bangkok (BKK) have the shortest average one-way travel time for one-stop routes: 15h 57m.
Which airport typically offers the quickest stopover for flights from Phnom Penh to London Heathrow Airport?
Average stopover duration for one-stop one-way flights from Phnom Penh to London Heathrow Airport, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Abu Dhabi (AUH) offer the fastest connection on this route, with an average stopover time of 1h 19m.
Related info for your journey
Find useful and relevant information for your journey from Phnom Penh to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
What airport do you fly from for flights from Phnom Penh to London Heathrow?
Phnom Penh Pochentong (PNH), located 5.0 mi from the city center, is the airport you fly out of when you book flights from Phnom Penh to London Heathrow. 0 airlines have flights from Pochentong to London Heathrow on a regular basis. Booking flights from Phnom Penh Pochentong to London Heathrow should not be difficult; the airport handles an average of 0 outbound flights to London Heathrow per day.
Can I find deals for flights from Phnom Penh to Heathrow that include hotel bookings?
Yes. In addition to deals on Phnom Penh to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Phnom Penh to Heathrow?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Phnom Penh to Heathrow.
Can I find deals for business class flights from Phnom Penh to Heathrow?
Yes. Cheapflights offers flight deals from Phnom Penh to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Phnom Penh to London Heathrow Airport?
Currently, August is the cheapest month in which you can book a flight from Phnom Penh to London Heathrow Airport (average of £501). Flying from Phnom Penh to London Heathrow Airport in April is currently the most expensive (average of £746). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
Explore flights to Heathrow departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 11 November 2025.
Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.
How does Cheapflights help users find flights from Phnom Penh to Heathrow?
Deals for Phnom Penh to Heathrow flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.
Why should you use Cheapflights to find cheap flight tickets from Phnom Penh to Heathrow?
By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Heathrow from Phnom Penh.
Can Cheapflights find flights from Phnom Penh to Heathrow with no change fees?
Need flexible booking options for your flight to Heathrow from Phnom Penh? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.
Can Cheapflights notify me if prices for flights from Phnom Penh to Heathrow become cheaper?
Yes, Cheapflights offers price alerts on Phnom Penh to Heathrow flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.
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