LON - PNH

£12,954 Find Cheap Flights from London to Phnom Penh

This is the cheapest return flight price found by a KAYAK user in the last 72 hours by searching for a flight from London to Phnom Penh departing on 19/7. 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, 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.
Travellers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 25% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest return fare
£12,954
Typical prices: £827-£1,066
British Airways
Sun 19/7Sat 1/8
LHR - PNH • 1 stop
Cheapest one-way flight
Multiple Airlines
Tue 20/1
LON - PNH • multi-stop
Video guide: How to find cheap flights to Phnom Penh
Watch video
Watch video
Watch video
Watch video
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 • 22% price drop
December
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to Phnom Penh!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from London to Phnom Penh (LON-PNH)

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

Sun, 19 Jul - Sat, 1 Aug
British Airways Logo
21:30 - 10:00
LHR
-
PNH
30h 30m
1 stop
British Airways Logo
18:20 - 05:25
PNH
-
LHR
17h 05m
1 stop
£12,954British Airways
Booking Insights

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

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

Find cheap flights to Phnom Penh
Find cheap flights to Phnom Penh

Planning a trip from London to Phnom Penh? KAYAK’s data-powered insights will help you find cheap flights. Learn the best time to fly, how early to book your ticket, and other tips to secure great prices.

How much is a return flight from London to Phnom Penh?

This analysis is based on the cheapest return trip price found on KAYAK in the last 12 months by searching for a flight from London to Phnom Penh departing in July.

What is the cheapest month to fly from London 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 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 to Phnom Penh is November, where tickets cost £521 (return) on average. On the other hand, the most expensive months are July and August, where the average cost of round-trip tickets is £877 and £842 respectively.

How far in advance should I book a flight from London 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 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 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 19 weeks before departure.

Good to know - Cheap tickets from London to Phnom Penh

Low seasonAugust
Cheapest flight£12,954
Best time to beat the crowds but there is an average 26% increase in price.
Most popular time to fly (21% more expensive on average)
Flight from London Heathrow Airport to Phnom Penh

When to book flights from London to Phnom Penh

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

  • 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).

  • How can I lower my carbon emissions when flying to Phnom Penh from London?

    To lower your carbon emissions when flying from London to Phnom Penh, you can consider several strategies. Choose airlines that prioritise fuel efficiency and carbon reduction initiatives, like British Airways and Singapore Airlines. Packing lighter and reducing excess baggage can also contribute to lower fuel consumption.

  • What family-friendly activities are available at London Gatwick Airport (LGW)?

    London Gatwick Airport (LGW) offers various family-friendly activities to keep young travellers entertained. Kids can enjoy the play areas specifically designed for them where they can burn off some energy before their flight. Additionally, the airport features a variety of family-friendly restaurants and cafes that cater to different tastes and dietary needs.

  • How far is the Royal Palace from Phnom Penh Airport (PNH)?

    The Royal Palace is located in the heart of Phnom Penh, Cambodia, approximately 6.8 miles from Phnom Penh International Airport (PNH). After arriving from London, it takes around 30 to 40 minutes by car to reach the Royal Palace, depending on traffic conditions. Visitors can immerse themselves in this iconic landmark's rich history and stunning architecture which serves as a cultural symbol of Cambodia's monarchy.

  • What disability services are available at London Heathrow Airport (LHR)?

    London Heathrow Airport (LHR) offers various disability services to ensure a smooth and accessible travel experience. These services include dedicated assistance for passengers with reduced mobility, accessible toilets and designated parking spaces. The airport also provides specialised support through trained staff, such as wheelchair assistance and escort services. 

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

    In the last 3 days, the lowest price for a flight from London to Phnom Penh was £12,954 for a return ticket.

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

    On your way to Phnom Penh, you’ll fly out from one of these London airports: London Gatwick, London Heathrow, London Luton, or London Stansted. You’ll be landing at Phnom Penh Pochentong.

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

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

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

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

  • What is the most popular stopover when flying to Phnom Penh from London?

    Guangzhou is the most popular stopover city among KAYAK users travelling from London to Phnom Penh.

  • 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 £725 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 £822 and an overall rating of 7.8.

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

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from London 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 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 London 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 with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from London 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 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 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.
  • As a British citizen flying from London to Phnom Penh, Cambodia, you must obtain a visa before your trip. Cambodia requires visitors to have a valid visa to enter the country which can be obtained either through an e-visa application or upon arrival at the airport. It's advisable to check the latest visa requirements prior to travelling.
  • London Gatwick Airport (LGW) offers several business lounges for travellers, including the No.1 Lounge and Club Aspire Lounge. These lounges offer a comfortable and quiet space to relax, work and enjoy complimentary food and drinks.

Reviews of the top 5 airlines flying from London 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 London 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.
8.1
Singapore AirlinesOverall score based on 1433 reviews
8.6Crew
8.3Boarding
8.0Entertainment
7.8Food
8.0Comfort
Airline reviews

Food was served to different people at different times and it wasn't clear why. The crew apologized for the wait. But it felt odd and inconsistent. They could use charging ports on each of the seats. Mine didn't have any. Also, they could've offered more snacks. It was a 12+ hour flight and no snacks were ever offered. Everything else was OK.

10.0 ExcellentJaysin, Jan 2026
SGN - SIN
Read more Singapore Airlines reviews

Food was served to different people at different times and it wasn't clear why. The crew apologized for the wait. But it felt odd and inconsistent. They could use charging ports on each of the seats. Mine didn't have any. Also, they could've offered more snacks. It was a 12+ hour flight and no snacks were ever offered. Everything else was OK.

The flight crew was phenominal! We couldn't have asked for any better. They were experienced professionals.

Food was just okay, need to improve for other menu variations

The consistency with Singapore Airlines is fantastic. Crew are always brilliant and food delicious in business class

Wish the seat don’t have restrictions, can’t fully insert backpack all the way inside.

Best service airline. The cabin crew is attentive and friendly. Inflight entertainment system is good

Service was top notch and the attention to passengers is great. Takeoff and landing was on schedule. Food selection is good

I have difficulties to book wheelchair for my parents returned flight

Airline should consider adding a small meal at the last leg of the flight, right now there is 7 hours of no meal break.

The business class seats were very uncomfortable. When in lie flat position my legs were very restricted.

business class is old but still done very well by the team.

Excellent airline. The plane was clean and the staff were very attentive

Good experience although the boarding gate is at the terminal extension hence need to leave lounge to head over earlier.

Thai Royal First is very good. Easy check in , Private room in the first class lounge and escort from ticketing to the plane. Once on board crew was very polite, food was outstanding, and the ride was smooth as silk. Restrooms were especially clean. Great Experience

I'm not interested in improving the airline. Therefore, I won't explain this in more detail. Next time I'll try a different one.

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).

It was great! Kept the time. Provided what was promised

Kayak and Aran grant issuing business class tickets without lounge access and sometimes 1 or 2 connections in economy class. It’s very disappointing to find out that after buying the ticket. Never buy tickets on kayak and Aran grant again

We have paid premium price for a business class Cabinet and we have received the old 777 with the following apart business class that is not to standard. It was very disappointing and it’s a very bad reputation for a premium airline company. This aeroplane should be the commission from being as a business class. We will pass this knowledge to our colleagues because the quality of business class in Etihad is not consistent and it is a lucky dip that sometimes you’re getting a good aeroplane and sometimes you’re getting their 30 years old aeroplane. The crew of the aeroplane have apologise and said that they hate this aeroplane and they have complained about it multiple times as well. Obviously Etihad is putting the economy in front of the Customer Experience. For the future we will not take this risk anymore and will fly with established company like emirates.

Etihad Check In counter/Station manager in Heathrow was bothering and not helpful at all. They are rude and not customer oriented

Seat space was tight and uncomfortable. There was hardly any cushioning giving me a terrible tail bone ache. Getting and out was extremely cramped. We paid for seat choices and felt totally ripped off. Food was mediocre. By the time the servers served 2 or 3 rows they ran out of this or that option as we saw on the inbound trip also. This is infuriating. Entertainment choices were extremely limited for such a long haul. The screen froze on occasion and did not switch off when the on off button was pressed. When it did it came back on its own in 5 seconds. The airlines has gone downhill since last year.

excellent, staff and boarding were all seamless and no issues, thank you!

More leg space than other flights, but *maybe* narrower seats

More leg space than other flights, but felt like *maybe* narrower seats?

Very delayed and uncomfortable seats. Nothing written in Urdu for Pakistanis. Tons of Pakistanis use the airline they should ensure the airline is accommodating them properly.

My baggage was not boarded and is still missing. I was only carring one piece of luggage and that is misplaced now I am stuck at mumbai without luggage. I had an onward journey from here

did not get a notification about seat selection ahead of time. We didn't end up sitting together.

I was denied boarding at the Brisbane airport and it seems like I won’t get any refunds from the airline

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.

On time. Friendly and helpful flight attendants. The plane was clean. Having a wine available would have been nice.

Your staff was exceptional. Could teach the other airlines-rules on etiquette, and service. Excellent landings on flights, carried out by your pilots. Only complaint is long delay on return flight in Beijing, onto Vancouver.

Worst than I expected, crew was not attentive, meal was as disgusting , they didn’t even drink selections as they would to other passengers. I felt discriminated

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.

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

Information on your arrival and departure airports