KTI - LHR

Find Cheap Flights from Phnom Penh to London – Compare and Save

1 adult
1 adult, Economy, 0 bags

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Everything you should know

Direct flights
Not available
There are currently no direct flights between Phnom Penh and Heathrow. You’ll need at least 1 connection.
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Top stopover airports
Cheapest • Avg £607 (return)
Shortest trip • 17h 59m (one-way)
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When to travel
Cheapest • 36% price drop
Most popular
Good to know
Good to know
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Flight Deals

Cheap Flights from Phnom Penh to Heathrow (KTI-LHR)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Phnom Penh to Heathrow 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.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Phnom Penh to Heathrow

Multiple Airlines Logo
KTI
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LHR
6246 mimulti-stop
Multiple Airlines Logo
LHR
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KTI
6246 mimulti-stop
Multiple Airlines
Booking Insights

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 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 September, where tickets cost £548 (return) on average. On the other hand, the most expensive months are January and November, where the average cost of round-trip tickets is £1,403 and £1,190 respectively.

Good to know - Cheap tickets from Phnom Penh to London

Low season

August
Best time to beat the crowds but there is an average 16% increase in price.
Most popular time to fly and prices are also 23% lower on average.

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

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

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

Reviews of the 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.
7.3
Etihad AirwaysOverall score based on 1479 reviews
7.8Crew
7.6Boarding
7.3Comfort
7.2Entertainment
7.1Food
Airline reviews

i have book the flight with baggage. and i have paid $800.00 for the baggage. when i contacted to JUSTFLY Costumer Service they told me that my baggage was included in the booking. then why i have to pay. i am going to file a complain against it. $800.00 is not at all small amount

2.0 MediocreAnonymous, Jun 2026
ATL - AUH
Read more Etihad Airways reviews

i have book the flight with baggage. and i have paid $800.00 for the baggage. when i contacted to JUSTFLY Costumer Service they told me that my baggage was included in the booking. then why i have to pay. i am going to file a complain against it. $800.00 is not at all small amount

I booked tickets for a family of five and specifically paid extra to select our seats together. We spent nearly $1,000 extra (around $100 per seat) for extra legroom so we could sit near each other. However, despite paying for this, we ended up being separated on the flight. This caused a major issue for our family because my parents do not speak English and rely on me to translate and assist them during the journey. I do not understand why Etihad changed our reserved seats without explanation. I am extremely dissatisfied with this experience. I expect the airline to do better, and I am requesting a full refund for the seat selection fees we paid.

excellent, the staff was kind and the boarding process was with no issues or hassle

I had a terrible experience checking in at the airport for my flight. I booked my ticket initially through Kayak while it was promoted as a ticket that offers a carry on and 2 suit cases. (I have a screen shot as a proof of it) I selected it to buy three tickets and paid online. Couple of minutes later airfare assist which is the OTA offering the ticket called me saying My card declined. So I used a different card that went through. I was surprised that they increased the price ticket by a $167. They said the ticket no longer exists and because my card declined I had to buy a new one. So I did. The day my family and I were traveling I could not check in and when I went to the airport I was shocked to be told my ticket had no bags allowed and must pay $200 per bag for three people 6 bags mean I have to pay $1200. I called the travel agency as I feel I was scammed the confirmation didn’t say anything about the bags and they never told me the new ticket doesn’t not include any bag so they changed it after I selected it on your app without informing me. Very sneaky. The travel agency said they will reimburse me only for one bag person. Which means I still paid $600 I still feel very disappointed to pay such an expense. I have always used Kayak to buy my flight tickets and telling everyone how good your rates and app are however after this I feel I was mislead and paid more for something I should not have to. You allowing such an agency on your platform will surely hurt your reputation and level of integrity. I have all the proofs from the screen shot to the confirmation email from them, the or email offering to reimburse o e bag per person and the $1200 bag fees receipts that I paid on the desk. I must be refund the full amount and I look forward to your response.

Online was good boarding also but a child was crying all the way with no intervention from crew member.

It has been a couple of years since I flew with Etihad last, after having a unpleasant experience with them coming out of the pandemic. I can say that the experience has uplifted, but I can’t really rate the service. At Barcelona airport the service was great, with their dedicated Etihad staff very helpful. The onboard experience wasn’t great, not very personalised and it really makes sense why Etihad doesn’t feature in the top 10 2023 Skytrax awards. The crew just seemed to be inattentive and almost absent from the cabin. I felt that I had to keep getting their attention. Even after I’d finished my meal, an hour went by before I had to call them to clear the tray/plate etc.

In my opinion, Etihad Airways is a first rate airline except for one important element. On the day before my return flights, when I chose my seats on the Etihad website I was charged an additional $55 (US) in order to sit on the aisle. I was not at all happy about this additional "hidden" charge and I felt cheated.

Entertainment did not work from flight from Abu Dhabi to Kolkata. Emirates has a much better flight in that sector.

Crew was good, boarding mediocre, food choices were limited, seating was not comfortable

It feels like the seat did not have any cushion just plywood. The seats are so compact that I could not even move at all and I am slim. Just imagine someone else. Singapore Air and Emirates are far far better than this. Do not even travel for free. For a 12 hour flight sitting on a plywood is horrible experience and on top of that the person at checking counter at NY was worst and rude. Plus they charge arms and leg for everything. I think they would also start charging for belts and oxygen also soon. First and last time flying with Ethiad.

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

Information on your arrival and departure airports