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Cheap flights from London Heathrow Airport to Phnom Penh from C$ 1,416

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LHR-PNH
16140 kmmulti-stop
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PNH-LHR
16140 kmmulti-stop
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How to get the cheapest flight ticket from London Heathrow Airport to Phnom Penh

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 Phnom Penh?

The cheapest month to fly to Phnom Penh from London Heathrow Airport is in November. Flight prices, which tend to average around C$ 1,089, are often lower during this time because this is during the off-season. If you aren’t able to travel to Phnom Penh during the month of November, then flying in May is also cheap. Prices for this month can be found on momondo for an average of C$ 1,100.

How far in advance should I book a flight to Phnom Penh?

You are more likely to see cheaper flights to Phnom Penh from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Phnom Penh for around C$ 1,324 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Phnom Penh from London Heathrow Airport for as low as C$ 1,103 on momondo.

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

As of October 2025, prices for London Heathrow Airport to Phnom Penh flights are approximately 28% cheaper when compared to flights at the same time last year.

When to book flights from London Heathrow Airport to Phnom Penh

Are you open to changing your travel dates? Check out the ideal times to fly from London Heathrow Airport to Phnom Penh according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap London Heathrow Airport to Phnom Penh (LHR to PNH) flight deals and tips

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

Direct flights

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

    There are 10032.2 km between London Heathrow and Phnom Penh Pochentong.

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

    Prices for flights from London Heathrow Airport to Phnom Penh Pochentong Airport are refreshed on a daily basis.

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Heathrow Airport to Phnom Penh Pochentong Airport.

  • What documentation or ID do you need to fly to Phnom Penh Pochentong Airport?

    The travel and health documents required for your trip to Phnom Penh Pochentong Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Phnom Penh Pochentong Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Why use momondo?

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

Finding the right flight to Phnom Penh from London is quick and easy when you have a range of options in front of you, from reputable agents and recognizable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Phnom Penh quick and easy, saving you time and money.

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

Yes. momondo allows you to filter the results for London to Phnom Penh flights to just show those with flexible booking policies.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from London to Phnom Penh.

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

Yes. momondo can track prices for London to Phnom Penh flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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