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Cheap flights from Phnom Penh to London from £440

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How to get the cheapest flight ticket from Phnom Penh to London Heathrow Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to London Heathrow Airport?

In general, August is the cheapest month to fly from Phnom Penh to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £562. The month of March is another great option to travel to London Heathrow Airport, with average flight prices from Phnom Penh averaging around £631.

What is the cheapest day to depart on your flight to London Heathrow Airport?

On average, the least expensive day to fly to London Heathrow Airport from Phnom Penh is on a Thursday. momondo users have found tickets for Thursday departures for as low as £569. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Saturday is £838.

What is the cheapest time of day to depart on your flight to London Heathrow Airport?

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the morning. momondo users have found flights departing from Phnom Penh to London Heathrow Airport in the morning for as low as £540. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are £1,053 on average. Flights to London Heathrow Airport from Phnom Penh in the afternoon are generally more expensive because this time of day is more convenient for travellers’ schedules.

How far in advance should I book a flight to London Heathrow Airport?

You are more likely to see cheaper flights to London Heathrow Airport from Phnom Penh when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around £782 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Phnom Penh for as low as £585 on momondo.

How have Phnom Penh to London Heathrow Airport flight prices changed over time?

As of November 2025, prices for Phnom Penh to London Heathrow Airport flights are approximately 23% cheaper when compared to flights at the same time last year.

When to book flights from Phnom Penh to London Heathrow Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Phnom Penh to London Heathrow Airport according to our flight data. Find out which month and days have the cheapest flights.
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Cheap Phnom Penh to London Heathrow Airport (PNH to LHR) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Phnom Penh to London Heathrow Airport

Direct flights

None
There are no direct flights from Phnom Penh to London Heathrow Airport. There are no popular flight routes from Phnom Penh to London Heathrow Airport.
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  • How far is Phnom Penh Pochentong to London Heathrow by plane?

    Phnom Penh Pochentong and London Heathrow are 6233.8 mi apart from one another.

  • When did momondo last update prices for flights from Phnom Penh Pochentong Airport to London Heathrow Airport?

    Prices for flights from Phnom Penh Pochentong Airport to London Heathrow Airport were last updated today.

  • How old do you have to be to fly from Phnom Penh Pochentong Airport to London Heathrow Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Phnom Penh Pochentong Airport to London Heathrow Airport.

  • What documentation or ID do you need to fly to London Heathrow Airport?

    The travel and health documents you'll need for your trip to London Heathrow Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London Heathrow Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

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Why use momondo?

Why should I use momondo to find a flight deal from Phnom Penh to London?

It is quick and easy to find Phnom Penh to London flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to London that suits you.

Can I find flights from Phnom Penh to London with flexible booking policies on momondo?

momondo does allow users to show only those flights to London from Phnom Penh which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Phnom Penh to London?

momondo provides multiple filters to help you find the best flight to London from Phnom Penh. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Phnom Penh to London right now. Can momondo alert me if prices change?

Price alerts on flights to London from Phnom Penh are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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