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Cheap flights from London Heathrow Airport to Phnom Penh from £403

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Find the cheapest flights from London Heathrow Airport to Phnom Penh

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See travel insights to Phnom Penh from

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 month of May is another great option to travel to Phnom Penh, with average flight prices from London Heathrow Airport averaging around £588.

What is the cheapest day to depart on your flight to Phnom Penh?

Our data shows that Monday is the least expensive day to fly to Phnom Penh. Tickets to fly out on this day can be as low as £620. Be sure to avoid booking your departure on a Friday as prices are generally higher than usual. According to our data, the average ticket price to Phnom Penh on Friday is £722.

What is the cheapest time of day to depart on your flight to Phnom Penh?

Our data shows that the cheapest London Heathrow Airport to Phnom Penh flights are usually those with departure times in the evening. Our users have found flights to Phnom Penh in the evening for as low as £529. At midday is when there is more demand to fly to Phnom Penh, so prices are often more expensive at around £814 per ticket.

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 £706 when searching weeks before you fly. 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 £635 on momondo.

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

As of December 2025, prices for London Heathrow Airport to Phnom Penh flights are approximately 10% more expensive 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 return 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

Fastest flight time

14h 30m

Direct flights

None
The fastest flight from London Heathrow Airport to Phnom Penh takes 14h 30m
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?

    Phnom Penh Pochentong is 6233.8 mi away from London Heathrow. A reasonable flight in good conditions will take 14h 30m.

  • 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 updated daily.

  • How many operators does momondo search for flights from London Heathrow Airport to Phnom Penh Pochentong Airport?

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

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

    The required travel and health documents for your Phnom Penh Pochentong Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Phnom Penh Pochentong Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from London Heathrow Airport to Phnom Penh?

Best airlines flying from London Heathrow Airport to Phnom Penh

Compare and see reviews for airlines that fly from London Heathrow Airport to Phnom Penh with momondo
Airline
Rating
Free Cancellation
Price
Air ChinaPriceFrom £389Free CancellationRating
7.2
127 reviews
Search Air China flights
China SouthernPriceFrom £402Free CancellationRating
7.5
122 reviews
Search China Southern flights
Shenzhen AirlinesPriceFrom £418Free CancellationRating
7.6
22 reviews
Search Shenzhen Airlines flights
Etihad AirwaysPriceFrom £515Free CancellationRating
7.4
1,331 reviews
Search Etihad Airways flights
China EasternPriceFrom £551Free CancellationRating
7.2
178 reviews
Search China Eastern flights
Singapore AirlinesPriceFrom £586Free CancellationRating
8.1
1,412 reviews
Search Singapore Airlines flights
Malaysia AirlinesPriceFrom £594Free CancellationRating
7.3
282 reviews
Search Malaysia Airlines flights
Vietnam AirlinesPriceFrom £636Free CancellationRating
7.6
216 reviews
Search Vietnam Airlines flights
British AirwaysPriceFrom £649Free CancellationRating
6.7
7,571 reviews
Search British Airways flights
Cathay PacificPriceFrom £679Free CancellationRating
7.6
1,095 reviews
Search Cathay Pacific flights

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from London to Phnom Penh for you.

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

All flight searches from London to Phnom Penh on momondo can be filtered to show those which offer flexible booking policies.

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

Once all potential London to Phnom Penh flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Of course. momondo tracks the price of London to Phnom Penh flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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