LON - PNH

£375 Find Cheap Flights from London to Phnom Penh

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from London to Phnom Penh departing on 4/1. 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 London to Phnom Penh.
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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

Mon, 2 Mar - Mon, 16 Mar
Etihad Airways Logo
13:55 - 18:25LHR-PNH
21h 30m1 stop
Etihad Airways Logo
07:55 - 18:10PNH-LHR
17h 15m1 stop
£478Etihad Airways
Find Deal
Mon, 13 Oct - Mon, 20 Oct
Etihad Airways Logo
09:30 - 06:55LHR-PNH
15h 25m1 stop
Etihad Airways Logo
08:30 - 18:45PNH-LHR
16h 15m1 stop
£482Etihad Airways
Find Deal
Thu, 20 Nov - Fri, 5 Dec
Etihad Airways Logo
08:50 - 06:30LHR-PNH
14h 40m1 stop
Etihad Airways Logo
07:55 - 18:10PNH-LHR
17h 15m1 stop
£489Etihad Airways
Find Deal
Mon, 24 Nov - Mon, 8 Dec
Etihad Airways Logo
13:55 - 18:25LHR-PNH
21h 30m1 stop
Etihad Airways Logo
07:55 - 06:40PNH-LHR
29h 45m1 stop
£491Etihad Airways
Find Deal
Mon, 13 Oct - Mon, 20 Oct
Etihad Airways Logo
09:30 - 06:55LHR-PNH
15h 25m1 stop
Etihad Airways Logo
08:30 - 18:45PNH-LHR
16h 15m1 stop
£492Etihad Airways
Find Deal
Mon, 24 Nov - Mon, 8 Dec
Etihad Airways Logo
08:50 - 18:25LHR-PNH
26h 35m1 stop
Etihad Airways Logo
07:55 - 06:40PNH-LHR
29h 45m1 stop
£495Etihad Airways
Find Deal
Mon, 24 Nov - Mon, 8 Dec
Etihad Airways Logo
08:50 - 06:30LHR-PNH
14h 40m1 stop
Etihad Airways Logo
07:55 - 06:40PNH-LHR
29h 45m1 stop
£495Etihad Airways
Find Deal
Wed, 24 Dec - Mon, 19 Jan
Etihad Airways Logo
20:55 - 06:30LHR-PNH
26h 35m1 stop
Etihad Airways Logo
07:55 - 18:10PNH-LHR
17h 15m1 stop
£496Etihad Airways
Find Deal
Fri, 28 Nov - Tue, 9 Dec
 Logo
11:05 - 18:25STN-PNH
24h 20m2 stops
 Logo
19:50 - 17:50PNH-STN
29h 00m3 stops
Mon, 13 Oct - Mon, 20 Oct
 Logo
06:20 - 06:55LGW-PNH
18h 35m2 stops
 Logo
08:30 - 10:50PNH-LGW
32h 20m2 stops

Everything you should know

Video guide: How to find cheap flights to Phnom Penh
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When to book
2 weeks
in advance
Our data shows that travellers who book at least 2 weeks in advance save around 14% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
November
Cheapest • 23% price drop
December
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest return fare
£478
Typical prices: £497-706
Etihad Airways
Mon 2/3Mon 16/3
LHR - PNH • 1 stop
Cheapest one-way flight
£375
Multi-carrier
Sun 4/1
STN - PNH • 2 stops
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KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to Phnom Penh!
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?

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

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

For London 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, the best deals are generally found on Thursday, with Saturday being the most expensive.

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 £501 (return) on average. On the other hand, the most expensive months are July and August, where the average cost of round-trip tickets is £872 and £800 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 14% 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 to Phnom Penh

Low seasonAugust
Cheapest flight£375
Best time to beat the crowds but there is an average 22% increase in price.
Most popular time to fly (21% more expensive on average)
Flight from London Stansted 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 £508 for a one-way ticket and £648 for a return.

  • 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.

  • 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 £717 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 £854 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 1365 reviews
8.0Entertainment
7.7Food
8.2Boarding
8.0Comfort
8.6Crew
Airline reviews

I was in a middle seat where I felt a bit too cramped otherwise the trip was good

8.0 ExcellentAnonymous, Sept 2025SIN - BLR
Read more Singapore Airlines reviews

I was in a middle seat where I felt a bit too cramped otherwise the trip was good

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.

Crew and service excellent. 2 hour delay for takeoff. SQ app showed flight on time.

Headwind delayed our flight which wasn’t the airlines fault

Food from Surabaya was below average but from Singapore is much better

The usual excellent experience with Singapore Airlines. The airplane was on time and actually early to Haneda Airport. The onboarding experience was pleasant with no delays, perhaps owing to the fact that the flight was not full. Nevertheless, the air crew were their usual outstanding standards in serving the passengers.

We were not given option for meals since they ran out of the other option but good thing the remaining options tasted great.

Horrendous. We upgraded and they took the money but cancelled one of our tickets. The recline action didn’t work on the seats for the flight from Singapore to London, pre booked meals but they seemed to have disappeared as well.. Phone customer service was horrendous. Took 5 phone calls and no fix. Craig at the airport was the only one who seemed to be able to get the ticket back.

Crew and service was excellent, but passengers should be offered a welcome drink before take off which did not happen. Food was very good. Unfortunately the lie-flat bed in business class was one of the most uncomfortable I have experienced. The configuration forces you to sleep with your legs at an angle instead of in a straight line, plus there is very little padding on the bed so it wasn't possible to sleep for more than 2-3 hours on an 18 hour flight. For what the airlines charges for a business class ticket their hard product leaves a lot to be desired.

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.

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.

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

The back of the chair - premium economy could not move back - 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.

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.

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

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

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