LHR - PNH

Find Cheap Flights from London Heathrow Airport to Phnom Penh

1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Phnom Penh

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Phnom Penh.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Phnom Penh.
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Cheap Flights from Heathrow to Phnom Penh (LHR-PNH)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Heathrow to Phnom Penh 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 Heathrow to Phnom Penh

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LHR-PNH
6232 mimulti-stop
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PNH-LHR
6232 mimulti-stop
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Everything you should know

When to book
2 weeks
in advance
Our data shows that travellers who book at least 2 weeks in advance save around 16% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
November
Cheapest • 18% price drop
November
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest return fare
Multiple Airlines
Thu 30/10
LHR - PNH • multi-stop
Cheapest one-way flight
Multiple Airlines
Thu 30/10
LHR - PNH • multi-stop
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Booking Insights

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

Get data-powered insights and trends into flights from Heathrow to Phnom Penh 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 London Heathrow Airport to Phnom Penh?

The average price of all round-trip flights from London Heathrow Airport to Phnom Penh clicked on KAYAK for each day over the last 12 months.

For London Heathrow Airport to Phnom Penh, Monday is the cheapest day to fly on average and Friday is the most expensive. Flying from Phnom Penh back to London Heathrow Airport, the best deals are generally found on Thursday, with Saturday being the most expensive.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from London Heathrow Airport to Phnom Penh, 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 London Heathrow Airport to Phnom Penh is November, where tickets cost £590 (return) on average. On the other hand, the most expensive months are July and August, where the average cost of round-trip tickets is £1,004 and £934 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from London Heathrow Airport to Phnom Penh, 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 London Heathrow Airport to Phnom Penh, you should book around 2 weeks before departure, which saves you about 16% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 15 weeks before departure.

Good to know - Cheap tickets from London Heathrow Airport to Phnom Penh

Low seasonAugust
Best time to beat the crowds but there is an average 30% increase in price.
Most popular time to fly and prices are also 18% lower on average.

When to book flights from Heathrow to Phnom Penh

Are your dates flexible? Find out the best times to travel from Heathrow to Phnom Penh 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 London Heathrow Airport to Phnom Penh flights

  • Where can I purchase Cambodian currency at Phnom Penh Airport?

    Cambodia Asia Bank (CAB) manages a foreign exchange kiosk near the Lost and Found office in the Arrivals Hall of the International Terminal, where you can purchase Cambodian banknotes for your trip. CAB, along with a host of other banks, provides several ATMs in the Arrivals Hall of the International Terminal for your convenience.

  • Can I hire a car at Phnom Penh Airport?

    Phnom Penh Airport does not have a car hire centre so you’ll have to depend on public transport, taxis or a hotel shuttle transfer to your destination. Royal Railway Cambodia has an express shuttle train from the airport to Phnom Penh Railway Station in the city. Travel time is about 30min with fares starting at 10,400 KHR (1.85 GBP) per person one-way. Otherwise, the No.3 City Bus or Express Bus can get you downtown.

  • Are there any accommodations at Phnom Penh Airport?

    No. Phnom Penh Airport does not have any onsite hotels, but there are a few in the area where you can find a place to stay. Dara Airport Hotel and Bali Resort & Apartment provide airport shuttle service at a surcharge, but Tian Yi International Hotel offers the service for free.

  • What are some cities/towns within reach from Phnom Penh Airport?

    Phnom Penh Airport is the largest in the capital and the principal international gateway to Cambodia. There are several provinces within striking distance from the airport, such as Pursat (115 miles northwest), Tbong Kmoum (86 miles northeast), and Takeo (50 miles south).

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

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

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

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

  • Which is the best airline for flights from London to Phnom Penh, Singapore Airlines or Thai Airways?

    The two airlines most popular with KAYAK users for flights from London to Phnom Penh are Singapore Airlines and Thai Airways. With an average price for the route of £711 and an overall rating of 8.1, Singapore Airlines is the most popular choice. Thai Airways is also a great choice for the route, with an average price of £884 and an overall rating of 7.8.

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

    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 London Heathrow Airport to Phnom Penh.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Phnom Penh from London Heathrow Airport 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 London Heathrow Airport to Phnom Penh?

    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 Phnom Penh with an airline and back to London Heathrow Airport with another airline.

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

    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 Phnom Penh from London Heathrow Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from London Heathrow Airport to Phnom Penh

  • Despite the lack of direct flights from London metro airports to Phnom Penh International Airport (PNH), formerly Pochentong International Airport, you can still enjoy one-stop service on Singapore Airlines and British Airways from London Heathrow Airport (LHR) and flights onboard JetStar Asia and Turkish Airlines out of London Gatwick Airport (LGW).
  • Gatwick Express and Heathrow Express trains remove the hassle from your airport commute with fast and efficient service to/from Central London. Gatwick Express trains from London Victoria Station depart about every 15min to London Gatwick Airport, while Heathrow Express trains offer a similar frequency of departures from London Paddington Station to London Heathrow Airport. Fare prices range from 19.90 GBP to 37 GBP for one-way or return tickets when you purchase them online.
  • Plaza Premium Lounge and Aspire Lounges at London Heathrow Airport offer a relaxing atmosphere with complimentary food and drinks before taking off on your trip abroad. Plaza Premium Lounges are located in the Departures Hall at Terminals 2 and 5, while Aspire Lounge has one location at Lounge D near Gate 9, Departures Hall at Terminal 5.
  • London Gatwick Airport’s North and South Terminals are separate buildings about a mile apart, but they are connected via an inter-terminal shuttle, which departs from the South Terminal Train Station. Journey time to North Terminal is about 2min, with shuttles running 24/7.
  • Whether you’re flying from London Heathrow or London Gatwick, download their respective airport apps to keep abreast of current flight information, including gate and terminal numbers and arrival times. You can also take advantage of special discounts on airport services, such as parking or Fast Track, in addition to offers by participating retail shops and restaurants.

Reviews of the top 5 airlines flying from Heathrow to Phnom Penh

 
See real verified KAYAK customer reviews for airlines flying from London to Phnom Penh. 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 Heathrow to Phnom Penh? 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.
7.8
Thai AirwaysOverall score based on 361 reviews
7.6Comfort
7.3Food
6.9Entertainment
7.8Boarding
8.3Crew
Airline reviews

The flight (boarding) was delayed by 40-50 minutes and there was very crowed. They need to improve on the timeliness & boarding process. (They asked passenger to board in groups, but the 2nd group was standing there waiting for 20 minutes!). However, services from the crew was very good, also the food was good as well. I also found the legroom was quite comfortable.

6.0 GoodPeerapat, Oct 2025KIX - BKK
Read more Thai Airways reviews

The flight (boarding) was delayed by 40-50 minutes and there was very crowed. They need to improve on the timeliness & boarding process. (They asked passenger to board in groups, but the 2nd group was standing there waiting for 20 minutes!). However, services from the crew was very good, also the food was good as well. I also found the legroom was quite comfortable.

Need to improve on punctuality. My flight was delayed by 1 hour.

Seats were uncomfortable and the vegetarian meal was awful. Some of the entertainment didn't work.

Except that our flight was cancelled, by mail, and later moved to 12 hours prior, then the experience was good. In Bangkok we were offered a hotel, it was fine, but would have been nice to know in advance😉

The flight was mostly fine, but I really wished that seats had an outlet to charge devices considering the length of the flight (15 hours there and 14 hours back).

Although booked meal of fruit only The crew had not received this special meal The same happened on my flight Bangkok / CAN The films are so old that best is to use own computer to watch downloads . Serve nuts but they do not warm up . Service is attentive , WC clean

Terrible. It’s like they are stuck in the dark ages. I brought a standard carry on suitcase and a back pack - I was told I could only carry on 7kg per bag - in business class, I was forced to remove articles from the suitcase and put them into my backpack! That’s the most ridiculous thing I’ve ever encountered in all my years of flying. The two bags weighed the same amount but one could not be more than 7kg. Holy cow.

They used Thai Smile plane, which is a smaller model and used to service only domestic flights; hence, the plane is small and quite compact. No entertainment on the flight. While boarding was delayed, it was done in a quick manner.

I give EVA 5 stars in every category. I enjoy this airline and it's great team of employees. I always highly recommend EVA to friends and family and everyone.

The flight was delayed going out of the gate at BKK that made it a difficult challenge to get through immigration transfer at tapei and make it to my departure on time. This appears to be a recurring issue. The flight crew and cabin crew were excellent. The food was very nice.

Will never book any flight from Kayak and will never travel ithad airline

Same problem place in the middle so small Im 1,85 m so not good 👍

I am a larger than average person and in my opinion i don't think it's fair to allocate a window seat to anyone who is my size or larger, i was seated between 2 large passengers on a full aircraft. The guy in the window seat also occupied a portion of the middle seat (my seat) which made my experience of flying with etihad very cramped and uncomfortable, i was flying from Abu Dhabi to Bangkok. Had this been a airbus 380 it would have been better as the seats are larger but unfortunately it wasn't so i had to endure the 6+hrs unable to get any rest

Old plane, old entertainment system. It wasn't working throughout the entire flight. I was offered to connect to their system via Wifi to watch on my phone. Crew wasn't very helpful except one lady who turned the experience around.

Boarding was excellent except they did last call 30 minutes earlier .

The check-in has been the very best so far I didn't get to use my priority access which made me feel like a paid a higher price with no benefit for that I loved the food Very tasty and hot The staff friendliness, empathy could be better as it was not linear amongst the whole crew Otherwise, no complaints. I'd still fly again via Etihad Great prices despite the long 6h of waiting time

It was OK as the seat which we paid for doesn’t have any window. We paid $120 for 3 seats but it’s for nothing. Crew could not help. None of the ports worked so all our phones went dry

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.

The food could be better. Toilets were smelly all along

second leg was more comfortable. Customer service in Abu Dhabi is okay.

In my return flight they couldn’t identify my ticket or boarding pass, I had to go to 3 different counters until I was able to get my boarding pass. The food was on, it was the bear minimum. They didn’t even recognise that I was a Muslim and can’t eat meat, chicken or pork. In one of the trays I believe they served me pork. The staff were very pleasant, but they need to be aware of their surroundings more carefully, one of them stuck her lower belly right into my face! I was shocked and very uncomfortable.

Overall I had good experience with China Southern airline. Nothing to claim. I hoped they could improve the meal quality that is.

Wow very impressed by the quality and attentiveness of service of China Southern. Lived the blankets! Will definitely fly with them again. Despite language barriers, a few attendants know enough English to understand our rudimentary Mandarin and respond to basic questions. Although they don’t explain the beverage and meal service on the website or ticketing documents, they offered regular beverage cart and snacks during the beginning hours and end hours of the long, transoceanic flight. A full meal at the beginning and end of the flight as well, and a midflight small sandwich (dinner roll sized) but we weren’t hungry and didn’t try that one. The expectation is that every sleeps during the middle of the flight. We were on a “redeye” departure from LAX with a morning arrival in China, so I don’t know if this service pattern is the same for other flights. The domestic flight we took from Guangzhou to Harbin offered conventional refreshments and meals like a US flight service. Note that they didn’t offer diet sodas. If you like to stay hydrated, I recommend bringing plenty of your own. It is served in small cups like any other drink. You can ask for a bottle but they’re tiny - about 6 ounces.

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

We are row 11, when the crew came to us, only one meal choice was available.

OK seats comfortable, easy boarding/embarking, excellent connection to domestic Malaysia flight with baggage checked through without customs. Catering especially drinks borderline ok luckily less important aspect

Comfortable seats in economy, managed a few hours sleep in an o night flight but the food was terrible. Surprising as Malaysia airlines has been good in the past. Service was mediocre this time too.

Vast improvement needed in customer service. I couldn’t get the drink of my choice during both meals (i.e. sparking water and Diet Coke). I had used plastic cups falling onto me from the tray. No eye contact when they thank you on the way out signalling an insincere thank you.

Jia yung was the flight attendant that made this a miserable flight.

The flight isn’t great, as the plane has faulty with light and noise. It blinks and make noise for 8hrs non stop! Causing health and sensory issues! Causing Hazard matter to all 3 babies that on bassinet seats. This matters affected 12 passengers and the most horrible flight I ever experience. Have been flying with MAS for more 30yrs and this is the worst! Very disappointed

AC not working, just slowly blowing room temperature air. Long taxi time does not help as well. Sweating all over the whole trip.

Did not take as cancelled 3 time so took another airline

It was a 2-hour flight so they didn't have much time for serving food. There was some turbulence so they could not serve hot coffee or tea for the safety reason. Good service, good tasting food, nice plane, a little bit of delay.

The IFE is quite unconvenient if using our own device. Not all passenger brought their own earphone/headphone.

cannot get seat information for LAX to IAH when check in in XI,AN

UA is ok. But check in was a very bad experience

I hate that you cannot check in online and when you are at the airport, there aren't any aisle seats left. Also, they could work a little on subtitles for their movies (not everyone is a native English speaker).

Nothing to complain of, the only reason I am not giving better marks is that I am used to flying with ANA and they are the top.

It's terrible that we can't do online check in because we didn't buy the tickets directly from Air china. It was not explained until I contacted Chatdeal and we could not sit together.

Communication between the captain/crew and the passengers needs to be improved.

Food and service are good. Bathroom was lack of lotions and cleaning. That should be improved.

Food & service very good next I will pick up again

Chinese flight attendants didn't speak english well. They didn't care enough to remember that I (east asian who isn't Chinese) wasn't Chinese and spoke English. Announcement in english on board was poor and I find it very difficult to understand what was announced. Also, a cabin bag allows only 5kg!

Everything was not satisfactory - the flight was delayed, staffs were ok but they didn't speak English well. I am from east Asia (not Chinese) and they didn't care enough to remember that I wasn't Chinese but persistently spoke chinese to me. The flight announcement in english wasn't clear to understand.

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