£396 Find Cheap Flights from London Heathrow Airport to Cambodia

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Heathrow to Cambodia departing on 8/4. 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

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Cheap Flights from Heathrow to Cambodia

Cheapest return prices found by our users on KAYAK in the last 72 hours
Siem Reap
Siem Reap2 stops£540
Krong Preah Sihanouk
Krong Preah Sihanouk2 stops£1,104
Siem Reap
Siem Reap2 stops£540
Krong Preah Sihanouk
Krong Preah Sihanouk2 stops£1,104

Book Cheap Heathrow to Cambodia Plane Tickets

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

Thu, 12 Feb - Thu, 19 Feb
Multiple Airlines Logo
13:50 - 09:35
LHR
-
KOS
36h 45m2 stops
Multiple Airlines Logo
16:30 - 21:55
KOS
-
LHR
36h 25m2 stops
£1,104Multiple Airlines
Thu, 12 Feb - Thu, 19 Feb
Multiple Airlines Logo
13:50 - 09:35
LHR
-
KOS
36h 45m2 stops
Multiple Airlines Logo
17:40 - 17:30
KOS
-
LHR
30h 50m3 stops
£1,200Multiple Airlines
Thu, 12 Feb - Thu, 19 Feb
Multiple Airlines Logo
21:05 - 11:45
LHR
-
KOS
31h 40m2 stops
Multiple Airlines Logo
12:15 - 05:35
KOS
-
LHR
24h 20m1 stop
£1,210Multiple Airlines
Thu, 15 Jan - Mon, 19 Jan
Vietnam Airlines Logo
12:20 - 09:35
LHR
-
KOS
38h 15m2 stops
Vietnam Airlines Logo
16:30 - 07:15
KOS
-
LHR
45h 45m2 stops
£1,397Vietnam Airlines
Thu, 15 Jan - Mon, 19 Jan
Vietnam Airlines Logo
12:20 - 09:35
LHR
-
KOS
38h 15m2 stops
Vietnam Airlines Logo
16:30 - 07:15
KOS
-
LHR
45h 45m2 stops
£1,398Vietnam Airlines
Thu, 15 Jan - Mon, 19 Jan
Vietnam Airlines Logo
12:20 - 09:35
LHR
-
KOS
38h 15m2 stops
Vietnam Airlines Logo
16:30 - 07:15
KOS
-
LHR
21h 45m1 stop
£1,427Vietnam Airlines
Thu, 15 Jan - Mon, 19 Jan
Vietnam Airlines Logo
17:45 - 09:35
LHR
-
KOS
32h 50m2 stops
Vietnam Airlines Logo
16:30 - 07:15
KOS
-
LHR
21h 45m1 stop
£1,427Vietnam Airlines
Thu, 12 Feb - Thu, 19 Feb
Multiple Airlines Logo
10:25 - 13:05
LHR
-
KOS
19h 40m1 stop
Multiple Airlines Logo
12:15 - 05:35
KOS
-
LHR
24h 20m1 stop
£1,470Multiple Airlines
Thu, 15 Jan - Mon, 19 Jan
Vietnam Airlines Logo
12:20 - 09:35
LHR
-
KOS
38h 15m2 stops
Vietnam Airlines Logo
16:30 - 07:15
KOS
-
LHR
45h 45m2 stops
£1,598Vietnam Airlines
Thu, 15 Jan - Mon, 19 Jan
Vietnam Airlines Logo
12:20 - 09:35
LHR
-
KOS
38h 15m2 stops
Vietnam Airlines Logo
16:30 - 07:15
KOS
-
LHR
21h 45m1 stop
£1,627Vietnam Airlines
Booking Insights

KAYAK's insights & trends for Heathrow to Cambodia flights

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

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

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 Cambodia, 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 Cambodia is November, when tickets cost £562 (return) on average. On the other hand, the most expensive months are July and August, when the average cost of return tickets is £988 and £912 respectively.

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

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 Cambodia, 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 a flight from London Heathrow Airport to Cambodia, 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 7 weeks before departure.

Good to know - Cheap tickets from London Heathrow Airport to Cambodia

Low seasonAugust
Cheapest flight£396
Best time to beat the crowds but there is an average 39% increase in price.
Most popular time to fly and prices are also 18% lower on average.
Flight from London Heathrow Airport to Krong Preah Sihanouk

FAQs - booking Cambodia flights

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

    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 Cambodia.

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

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

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly from London Heathrow Airport to Cambodia with an airline and back 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 Cambodia?

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

Reviews of the top 5 airlines flying from Heathrow to Cambodia

 
Need help choosing which airline to fly with from Heathrow to Cambodia? 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 1424 reviews
8.3Boarding
7.8Food
8.6Crew
8.0Entertainment
8.0Comfort
Airline reviews

The crew was very courteous and professional. the flight is relatively clean and comfortable.

10.0 ExcellentSyafiqah, Dec 2025
DPS - SIN
Read more Singapore Airlines reviews

The crew was very courteous and professional. the flight is relatively clean and comfortable.

Pleasant business class flight experience with good onboarding experience. Flight service team was excellent with usual book-the-chef menu available

SQ service is great as always. However, the food quality seems to have gotten a lot worse recently.

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

I have difficulties to book wheelchair for my parents returned flight

Good service and food. For buying items on flight should be preordered as they don’t keep much stock on board.

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

Construction at PDX resulting in very lung walk from the rental car to the gate. SFO, extremely long walk between terminals to get to connecting Singapore airlines flight. My smart watch recorded a total of 3 miles.

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.

So happy I flew with Singapore Airlines. The customer service is top notch. I am terrified of flying and the staff made me feel so at ease. Will only fly Singapore internationally moving forward.

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).

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.

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.

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.

Was so disappointing. Business class with no TV, uncomfortable seats. Had much higher expectations.

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

I paid 44 $ for seat upgrade (22D) and my seat was stack in high position for all the 6 hours of flight. I don't recommend the upgrade. I am looking to get my upgrade payment back

The flight from Abu Dabhi to Bangalore was terrible. The plane was an order model with no onboard entertainment. The beverage selection were very limited.

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

We booked a business class ticket via Underpricer. Somehow they screwed up our ticket from Abu Dhabi to Ahmedabad. We will be hesitant to book again with them.

In Colombo when I-drop my baggage Sri Lanka air line crew not polite way talk very rude

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

Did not provided with option for class upgrade. Staff at gate was not able and willing to accommodate with class upgrade, eather with plenty empty spots in business and first class.

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 Heathrow to Cambodia

Information on your arrival and departure airports