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PNH - LHR

£240 Find Cheap Flights from Phnom Penh to London

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Phnom Penh to Heathrow departing on 10/5. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult

KAYAK searches hundreds of travel sites at once for deals on flights to London Heathrow Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Phnom Penh to London, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Phnom Penh to London, as well as popular online travel agencies
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Cheap Flight Deals from Phnom Penh to London (PNH-LHR)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Phnom Penh to London that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent return flight deals from Phnom Penh to Heathrow

KAYAK's recommended return flight deals from the most popular airlines that fly from Phnom Penh to Heathrow.
Discover the best prices for you by selecting your travel dates on KAYAK.
Choose your dates
China Southern Logo
08:00 - 19:00PNH-LHR
17h 00m1 stop
China Southern Logo
19:15 - 10:40LHR-PNH
33h 25m2 stops
£477China Southern
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Wed, 21 May - Wed, 28 May
China Southern Logo
08:00 - 19:00PNH-LHR
17h 00m1 stop
China Southern Logo
21:00 - 00:10LHR-PNH
21h 10m2 stops
£500China Southern
Find Deal
Fri, 13 Jun - Sat, 21 Jun
China Eastern Logo
12:40 - 18:40PNH-LHR
36h 00m2 stops
China Eastern Logo
21:20 - 11:35LHR-PNH
32h 15m2 stops
£501China Eastern
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Wed, 21 May - Wed, 28 May
China Southern Logo
12:05 - 19:00PNH-LHR
36h 55m1 stop
China Southern Logo
19:15 - 10:40LHR-PNH
33h 25m2 stops
£510China Southern
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Fri, 23 May - Sun, 8 Jun
China Eastern Logo
00:10 - 18:40PNH-LHR
24h 30m1 stop
China Eastern Logo
21:20 - 23:15LHR-PNH
19h 55m1 stop
£513China Eastern
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Tue, 20 May - Wed, 28 May
Shenzhen Airlines Logo
12:15 - 19:50PNH-LHR
37h 35m1 stop
Shenzhen Airlines Logo
22:05 - 11:10LHR-PNH
31h 05m1 stop
£528Shenzhen Airlines
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Fri, 13 Jun - Sun, 22 Jun
Shenzhen Airlines Logo
12:15 - 20:00PNH-LHR
37h 45m1 stop
Shenzhen Airlines Logo
22:05 - 11:10LHR-PNH
31h 05m1 stop
£530Shenzhen Airlines
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Sat, 10 May - Fri, 16 May
Logo
00:20 - 20:30PNH-LHR
26h 10m1 stop
Logo
22:05 - 11:10LHR-PNH
31h 05m1 stop
£549
Find Deal
Thu, 5 Jun - Fri, 20 Jun
Logo
12:15 - 20:00PNH-LHR
37h 45m1 stop
Logo
22:40 - 11:10LHR-PNH
30h 30m2 stops
£560
Find Deal
Thu, 5 Jun - Thu, 12 Jun
Air China Logo
00:20 - 20:30PNH-LHR
26h 10m1 stop
Air China Logo
20:25 - 11:10LHR-PNH
32h 45m2 stops
£580Air China
Find Deal
Thu, 12 Jun - Sun, 22 Jun

KAYAK's insights & trends for Phnom Penh to Heathrow flights

Get data-powered insights and trends into flights from Phnom Penh to Heathrow to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Phnom Penh to London?

The average price of all round-trip flights from Phnom Penh to London Heathrow Airport clicked on KAYAK for each day over the last 12 months.
When flying from Phnom Penh to London, you should consider leaving on a Thursday and avoid Saturdays if you are looking for the best rates. For your return to Phnom Penh, you’ll find the best rates on Mondays and the most expensive ones on Fridays.

What is the cheapest month to fly from Phnom Penh to London Heathrow Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Phnom Penh to London Heathrow Airport, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Phnom Penh to London Heathrow Airport is October, where tickets cost £594 (return) on average. On the other hand, the most expensive months are July and February, where the average cost of round-trip tickets is £1,116 and £959 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Phnom Penh to London Heathrow Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.
To get a below average price on the flight from Phnom Penh to London Heathrow Airport, you should book around 5 weeks before departure. For the absolute cheapest price, our data suggests you should book 5 weeks before departure.
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Good to know - Cheap tickets from Phnom Penh to London

Low season

April

High season

July

Cheapest flight

£240
Best time to beat the crowds but there is an average 11% increase in price.
Most popular time to fly (42% more expensive on average)
Flight from Phnom Penh to London

When to book flights from Phnom Penh to Heathrow

Are your dates flexible? Find out the best times to travel from Phnom Penh to Heathrow based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Phnom Penh to London flights

  • What is the cheapest flight from Phnom Penh to London Heathrow Airport?

    In the last 3 days, the lowest price for a flight from Phnom Penh to London Heathrow Airport was £321 for a one-way ticket and £637 for a return.

  • Which airports will I be using when flying from Phnom Penh to London?

    Phnom Penh and London are both served by 1 main airport. You will leave Phnom Penh from Phnom Penh Pochentong and will be arriving at London Heathrow.

  • Which aircraft models fly most regularly from Phnom Penh to London?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Phnom Penh to London?

    Star Alliance, SkyTeam, and oneworld are the airline alliances operating flights between Phnom Penh and London, with oneworld being the most commonly used for this route.

  • How does KAYAK find such low prices on flights from Phnom Penh to London?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Phnom Penh to London.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Phnom Penh to London?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London from Phnom Penh is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Phnom Penh to London?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to London with an airline and back to Phnom Penh with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Phnom Penh to London?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to London from Phnom Penh up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top airline flying from Phnom Penh to Heathrow

 
See real verified KAYAK customer reviews for airlines flying from Phnom Penh to London. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Phnom Penh to Heathrow? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.5
China SouthernOverall score based on 94 reviews
8.3Crew
7.4Food
7.9Boarding
7.8Comfort
7.5Entertainment
Airline reviews

China Southern was not the problem. I booked my flight through Kayak and also received a booking reference and alert details regarding departure time and gate numbers… however Kayak NEVER actually booked my flight! We were stranded at the airport without a flight for a long awaited holiday!

2.0 MediocreAnonymous, Mar 2025LGW - CGO
Read more China Southern reviews

China Southern was not the problem. I booked my flight through Kayak and also received a booking reference and alert details regarding departure time and gate numbers… however Kayak NEVER actually booked my flight! We were stranded at the airport without a flight for a long awaited holiday!

The connection between LA and Atlanta was too much stress

Terrible boarding experience,,food is very poor that I I . Never going book this airline again.

The crew were kind, patient and responsive. The service was excellent, even though we travelled the cheapest economy class. We arrived at our destination 40 min early, which for a 15+ hour flight is a great bonus. The boarding seemed a bit "loose", but got us boarded on time, and the plane was off exactly @ 0:30 hrs.

The airport didn‘t give me the ticket. I called customer service to ask for a refund but they kept giving me a perfunctory response and refused to refund me.

The flight was delayed hours and most flights from CS are always delayed. Plane was efficient and got us home but not the best food and no entertainment system at all.

Not good - chair back could not move back for premium economy. Not worth the price

The back of the chair - premium economy could not move back - not worth the price

It was okay. Boarding the staff made you feel rushed like we were late or something

It was great. The staff were so nice and helpful the food was great and they always made sure I was okay. As a foreigner I was worried about the language barrier but it was absolutely no issues. I highly recommend

Everything you need to know for your flight from Phnom Penh to Heathrow

Information on your arrival and departure airports

Heathrow (LHR)
Phnom Penh (PNH)

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