PNH - LHR

$320 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 London departing on 11/30. 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
1 adult, Economy

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip 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.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Phnom Penh to London

Wed, Jun 18 - Wed, Jun 25
China Southern Logo
3:35 pm - 7:00 pmPNH-LHR
33h 25m1 stop
China Southern Logo
7:15 pm - 10:40 amLHR-PNH
33h 25m2 stops
$682China Southern
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Wed, Jun 18 - Wed, Jun 25
China Southern Logo
8:00 am - 7:00 pmPNH-LHR
17h 00m1 stop
China Southern Logo
10:10 pm - 2:30 pmLHR-PNH
34h 20m1 stop
$706China Southern
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Tue, Jun 17 - Wed, Jun 25
 Logo
12:20 am - 5:45 pmPNH-LHR
23h 25m1 stop
 Logo
10:05 pm - 11:10 amLHR-PNH
31h 05m1 stop
Wed, Jun 18 - Wed, Jun 25
China Eastern Logo
12:40 pm - 6:40 pmPNH-LHR
36h 00m2 stops
China Eastern Logo
9:20 pm - 11:35 amLHR-PNH
32h 15m2 stops
$794China Eastern
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Tue, Jun 17 - Wed, Jun 25
Air China Logo
12:20 am - 5:45 pmPNH-LHR
23h 25m1 stop
Air China Logo
8:25 pm - 11:10 amLHR-PNH
32h 45m2 stops
$797Air China
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Thu, Jun 26 - Fri, Jul 4
China Eastern Logo
12:10 am - 6:40 pmPNH-LHR
24h 30m1 stop
China Eastern Logo
9:20 pm - 11:15 pmLHR-PNH
19h 55m1 stop
$810China Eastern
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Thu, Jun 26 - Fri, Jul 4
China Eastern Logo
12:10 am - 6:40 pmPNH-LHR
24h 30m1 stop
China Eastern Logo
9:20 pm - 11:35 amLHR-PNH
32h 15m2 stops
$811China Eastern
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Wed, Oct 1 - Thu, Oct 30
Singapore Airlines Logo
2:05 pm - 3:45 pmPNH-LHR
31h 40m1 stop
Singapore Airlines Logo
8:35 pm - 1:50 pmLHR-PNH
34h 15m1 stop
$1,035Singapore Airlines
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Mon, Jul 7 - Mon, Jul 28
British Airways Logo
6:20 pm - 5:25 amPNH-LHR
17h 05m1 stop
British Airways Logo
1:45 pm - 4:15 pmLHR-PNH
20h 30m2 stops
$1,282British Airways
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Thu, Jul 10 - Fri, Jul 25
Air China Logo
12:20 am - 8:30 pmPNH-LHR
26h 10m1 stop
Air China Logo
10:40 pm - 11:05 pmLHR-PNH
18h 25m1 stop
$1,285Air China
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KAYAK's insights & trends for Phnom Penh to London flights

Get data-powered insights and trends into flights from Phnom Penh to London 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.

Your flight ticket price will generally be cheaper if you fly to London on a Sunday and more expensive on a Wednesday. On your return trip to Phnom Penh, you should consider flying back on a Saturday, and avoid Wednesdays for better deals.

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 $777 (return) on average. On the other hand, the most expensive months are July and February, where the average cost of round-trip tickets is $1,498 and $1,282 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 4 weeks before departure. For the absolute cheapest price, our data suggests you should book 5 weeks before departure.

Good to know

Low seasonFebruary
High seasonJuly
Cheapest flight$320
Best time to beat the crowds but there is an average 21% increase in price.
Most popular time to fly with an average 41% increase in price.
Flight from Phnom Penh to London

When to book flights from Phnom Penh to London

Are your dates flexible? Find out the best times to travel from Phnom Penh to London based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips 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 $320 for a one-way ticket and $682 for a round-trip.

  • Do I need a passport to fly between Phnom Penh and London?

    Yes, you’ll need a passport to travel to London from Phnom Penh.

  • 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 Star Alliance being the most commonly used for this route.

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

    The two airlines most popular with KAYAK users for flights from Phnom Penh to London are Singapore Airlines and Thai Airways. With an average price for the route of $1,273 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 $1,292 and an overall rating of 7.7.

  • 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 travelers 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 round-trip ticket. You could then fly to London with an airline and back to Phnom Penh with another airline. Booking your flights between Phnom Penh and LHR can sometimes prove cheaper using this method.

  • 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.

Top 5 airlines serving from Phnom Penh to London

 
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 London? 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.
7.7
Thai AirwaysOverall score based on 333 reviews
8.3Crew
6.8Entertainment
7.3Food
7.8Boarding
7.5Comfort
Airline reviews

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.

6.0 GoodJon, May 2025LAX - TPE
Read more Thai Airways reviews

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.

The boarding efficiency was good. A couple of the flight attendants did not seem in the best of moods. Overall it was a good experience.

The setting configuration of the aircraft stinks. Nobody should pay business class fares and be so uncomfortable. The design of facing fellow passengers is a brilliant nincompoop.

Entertainment is limited with a relatively old catalogue. Wi-Fi never works and the cabin and lavatory had evidence of a lot of scuff marks and temporary repairs. Nothing unsafe, but a bit tatty in places.

Delayed flight in Singapore caused the transfer at Bangkok to be very stressful. Fortunately, no elderly were in this trip, else it will not be possible to catch the connecting flight. There were also several occasions throughout the flight journey where some of the passengers were not wearing their seat belts despite several remainders from the stewardess.

USB charging port was not working at my seat 48K.

I enjoy flying with Thai Airways, however their B788 business class configuration is quite dated. Additionally , while the service is always friendly and efficient, I’m getting tired of the same “usual suspects” when it comes to food choices. Since it was a lunchtime flight, what about some gourmet sandwiches or some type of salad dish for the main course? The entertainment options are also quite limited and this is not unique to TG, so much so that given the short duration of the flight I ended up not bothering with any entertainment. Finally, despite signs around the cabin advising wifi available, I was unable to con-net and in fact I’ve never been able to connect on any TG flight over the last year or so - what’s the go here??

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

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

The staff was great and probably that's the single most thing that distinguished this particular Qatar flight from my average typical experience. They genuinely wanted to please you and do their best.

The Achilles heel of the experience with Qatar Airways is the Doha Airport, especially for travellers arriving into Doha and not transiting. This airport suffers from being ambitiously big and the immigration into Qatar being overly time taking. At the end of my particular flight in which my travel was ending in Doha, the plane parked at a very remote terminal, from where it took me 30 minutes to arrive just at the immigration counter, with fast paced walking and the time on a train inside the airport. Then, at the immigration counter it takes up to a minute or more to process each tourist visitor,due to time taking face and finger scanning processes and langugage barriers if there are questions or information to be exchanged verbally with the officers. If several planes have landed at the same time, it is not unusual that one has to wait 45 to 60 minutes in the immigration queue. In short, the frustration of arriving at Doha takes away all positive vibe of the airline, as the airline and the airport are heavily intertwined and are marketed together.

It was ok, not much more can be said, as long as airlines/aircraft manufacturers insist on cramming in as many seats as possible....best of a bad situations, seats are simply too uncomfortable to sit in for more than a few hours. Lack of flexible headrests not a help on long overnight flights either.

The space was tight, hardly any leg room and the crew surprisingly were busy and did not take the time to attend to passengers, felt rushed. There was a delay for check in since the systems were down the airport staffs were accommodating

I purchased Qatar airways after seeing ads about its service. To my surprise Qatar is marketing gimmick and horrible airlines which I don’t recommend to anyone Flight was dirty including flight from Miami to Doha And Doha airport restrooms are dirty On top of this they use this pathetic cheap indigo From Doha to Hyderabad which I will never fly Also they lost one of my baggage in Indigo and still waiting to receive it. I will never travel Qatar and will never recommend

Seating is terrible, having seats so crammed is unacceptable for a 15-hour journey. I cannot stress enough how uncomfortable it is to sit in such an aircraft. Leg space is roomier in a domestic aircraft. I have not experienced this kind of crammy seating in domestic flights either in the US or other international airlines overseas.

Overall good. Food choice in business class is a concern as same dishes on every flight for months. Crew is great and seats on this sector were fine . They need to have more variety in dining

Do not overbook flights and kick out confirmed ticketed passengers :-(

Check in desk people constrained by fear. Obvious typo on Uganda visa, even though approved, caused loss of flight. Something is definitely wrong with this system.

My carry on bag was taken by Alaska Air as we boarded in LAX! She said there was not room. There was plenty of room. I told her that my meds and personal items were in it. She did not care. She said it would be sent to my final destination, Nairobi. Well it got to Nairobi the day I was to fly home. The handle of my bag was crushed so could not retract. So I had to remove it. I had to buy converters, malaria medication. personal items. I filled out the missing form at the Nairobi airport. I asked that it be shipped to the Kisumu airport. When it was obviously not going to make it for my time in Kenya. I asked that it be sent to John Wayne Airport. NONE of that happened. I only knew it was at Nairobi because my air tag indicated it was finally in Nairobi the day I was leaving Kenya! Now I need to purchase a new carry on bag!!!

Super surprised with the entire experience. Business class is incredible. Flight attendants around the world could learn customer service from these people. Simply fabulous experience all the way around.

Pillow and blanket are dirty. My son got multiple bites during the flight

Flight was on time. My group paid for seat’s so that us four can be seated next to each other. We all got separated. We all got middle seats, which made it more difficult to be able to get up and stretch or use the restroom. We tried talking to the employees at China Eastern and they were of no help. We will not be taking this flight or recommend this route to others in the future. Also I will be contacting customer service on how I can get our money back for paying for assigned seats.

China eastern was fantastic. I had read so many bad reviews that had made me nervous. However, I found that the flight attendant’s, and customer service check in etc. etc. was excellent. I had no problems. I would fly with them again!

Excellent! I had read some negative reviews but I found out that it was not all was not true! The staff was courteous and helpful. The flight take off and landing was nice & easy. The food was good! I asked for a second and I got it easily and without an attitude! All was wonderful!

Excellent experience however older aeroplanes used by China Eastern Airlines.

The crew were excellent, service amazing, blankets and pillow good, cabin temperature perfect, the flight on time, food was unusual selection however plentiful, price for tickets unbeatable through Kayak. Older aeroplanes used by China Eastern was the only down side.

Delay in off-boarding due to customs at SFO... pilot announcement should have come earlier so passengers don't clog aisles.

Better good than most, if not all European airlines. If you’re stuck in an economy seat anyways, China Eastern is a good choice because of shorter flight time, being able to overfly Russia

The temperature of the plane cabin is too hot. Sweat and uncomfortable. Also my food tray was broken down drinks fall off

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!

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.

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.

I wish I had been able to choose a vegetarian meal. Crew friendly and helpful. Seat was ok. All quite efficient and pleasant. Would recommend for inner China travel for sure.

The flight is not bad, but the Business Lounge is not big enough for the quantity of people they accept and there is a limited options for food and beverages.

It was simply bad and on top of that my luggage hasn't been delivered until now. They can't even localize it which is just unacceptable when they are supposed to scan the bar code they put when we check in

We bought premium Economy, thinking it would be more comfortable, but the seat is so narrow ,that my legs and feet are swollen , I can't wear shoes !

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