£364 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 3/7. 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

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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£596
Siem Reap
Siem Reap2 stops£596

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

Tue, 1 Sep - Tue, 22 Sep
SWISS Logo
20:05 - 18:55
LHR
-
SAI
40h 50m
2 stops
SWISS Logo
09:40 - 21:45
SAI
-
LHR
18h 05m
2 stops
£596SWISS
Sat, 7 Nov - Mon, 23 Nov
SWISS Logo
18:40 - 09:50
LHR
-
SAI
32h 10m
2 stops
SWISS Logo
09:55 - 08:05
SAI
-
LHR
29h 10m
2 stops
£605SWISS
Sat, 7 Nov - Wed, 25 Nov
SWISS Logo
18:40 - 09:50
LHR
-
SAI
32h 10m
2 stops
SWISS Logo
16:45 - 08:05
SAI
-
LHR
22h 20m
2 stops
£612SWISS
Sun, 8 Nov - Mon, 23 Nov
SWISS Logo
09:00 - 18:45
LHR
-
SAI
26h 45m
2 stops
SWISS Logo
09:55 - 08:05
SAI
-
LHR
29h 10m
2 stops
£613SWISS
Wed, 2 Sep - Wed, 23 Sep
Multiple Airlines Logo
13:35 - 18:55
LHR
-
SAI
23h 20m
2 stops
Multiple Airlines Logo
09:40 - 21:45
SAI
-
LHR
18h 05m
2 stops
£615Multiple Airlines
Sat, 7 Nov - Tue, 24 Nov
SWISS Logo
18:40 - 09:50
LHR
-
SAI
32h 10m
2 stops
SWISS Logo
09:55 - 11:15
SAI
-
LHR
32h 20m
2 stops
£619SWISS
Sun, 8 Nov - Tue, 24 Nov
SWISS Logo
09:00 - 18:45
LHR
-
SAI
26h 45m
2 stops
SWISS Logo
09:55 - 08:05
SAI
-
LHR
29h 10m
2 stops
£628SWISS
Sat, 3 Oct - Sun, 18 Oct
Lufthansa Logo
17:50 - 18:55
LHR
-
SAI
19h 05m
2 stops
Lufthansa Logo
19:35 - 17:05
SAI
-
LHR
27h 30m
2 stops
£629Lufthansa
Wed, 19 Aug - Wed, 16 Sep
Multiple Airlines Logo
20:25 - 18:55
LHR
-
SAI
40h 30m
2 stops
Multiple Airlines Logo
09:40 - 21:45
SAI
-
LHR
18h 05m
2 stops
£638Multiple Airlines
Mon, 31 Aug - Sun, 13 Sep
SWISS Logo
18:40 - 09:40
LHR
-
SAI
33h 00m
2 stops
SWISS Logo
09:40 - 21:45
SAI
-
LHR
18h 05m
2 stops
£657SWISS
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 £271 (return) on average. On the other hand, the most expensive months are July and May, when the average cost of return tickets is £585 and £511 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 32% compared to booking last-minute. For the absolute cheapest price, our data suggests you should book 3 weeks before departure.

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

Low seasonAugust
Cheapest flight£364
Best time to beat the crowds but there is an average 10% increase in price.
Most popular time to fly and prices are also 13% lower on average.
Flight from London to Siem Reap

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.
8.2
Singapore AirlinesOverall score based on 1555 reviews
8.3Boarding
8.1Entertainment
8.0Comfort
8.6Crew
7.8Food
Airline reviews

Really great service throughout and the food was really nice. I can highly recommend thank you very much.

10.0 ExcellentPeter, Apr 2026
LHR - BKI
Read more Singapore Airlines reviews

Really great service throughout and the food was really nice. I can highly recommend thank you very much.

It was okay. I feel that Singapore Airlines isn't as good as it used to be but it's still not bad

I wish there was a little more leg room between the seats. The recline was good and seats overall were comfortable. I also didn’t like the 2-4-2 configuration.

Service excellent would chose Singapore airlines as my first choice

Crews are not allowed to perform any service whenever the captain deems there’s a chance of turbulence. Even if it is perfectly smooth air.

They made me check my carry on even though there was room We un boarded in a strange way but overall it was good

Perfect experience from boarding through to leaving the flight, comfortable and personalised service from all staff, highly recommended

The male traveller seated in the row in front diagonally opposite my husbands seat across the aisle as soon as the seatbelt sign went off moved across the aisle into the seat in front of my husband for the entire journey from London to Singapore he had his seat reclined and pushed back and the seat touching my husbands knees for the entire journey from London to Singapore. very uncomfortable for my husband.

Please have the artiste showcase of classic international movies. Please have better food. There was no dessert or yogurt in my Ind Veg meal.

More Baggage limit Alternative of virtual check in at airport , prefer personal touch with “real person”check in counter for baggage drop

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.

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

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).

Could have been better. I prefer Thai airlines only but it hasnt been reliable.

Lunch Food was tasteful and had variety. Seat was comfortable. However, when I was reserving my seats during booking, the seat configuration showed was 3-3-3, but when I boarded it was a 2-4-2 configuration? Also during booking, I had also bought travel insurance together with my TG booking. However there was no confirmation of my purchase from Allianz and TG. After several emails with TG contact, sales, reservation and Allianz was i able to confirm my insurance purchase. When the policy was issued, the birth dates of me and my wife were wrongly stated and I had to go through another round of emails with Allianz to get it corrected. Otherwise any claims would be void! It was indeed not a very good booking experience!

Check in was a disaster. 90 minutes and only 2 economy check in desks open. Had to rush to catch the flight.

I couldnt go on this flight and lost all my money over 1,000 UK Pounds as my visa to Myanmar was not accepted :(

Thai Airways is one of the best airlines in the business. Looking forward to fly again with them.

Excellent service. departed on time, and arrived ahead of schedule. The whole restrictions around no food/drink is a bit weird even with Covid. Also, no mobiles and iPad use during takeoff and landing is very 2006!

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.

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 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.

It was okay. Boarding the staff made you feel rushed like we were late or something

Crew: Everybody was polite. People just need to get efficient and less reworking things. Entertainment: Could have move movies and games. The “music” section is a joke, only ONE available. Food: The food provided on the flights boarding in china needs a serious reworking. Too much oil, bad for your stomach, tastes too artificial and the eggs were a giant mass of green dough.

We were diverted to Chengdu, because of bad weather and finally made it to Chong King about 7 hours later

No red vine, no whiskey, no vodka. No that I wanted all of them at once but still...

The flight was okay it was the kayak customer service that was poor, I have been trying to change my name on my flight ticket 3 days before my flight and nothing got done about it even tho I messaged so many times and phoned, all I got in return was that is was being processed and still to this day nothing has been done about it, I think it’s disgusting and un needed stress to the trip.

The food was perfect. The boarding process is a bit long. Given the late boarding time, I felt very tired by the time I was seated.

I booked tickets for a family of five and specifically paid extra to select our seats together. We spent nearly $1,000 extra (around $100 per seat) for extra legroom so we could sit near each other. However, despite paying for this, we ended up being separated on the flight. This caused a major issue for our family because my parents do not speak English and rely on me to translate and assist them during the journey. I do not understand why Etihad changed our reserved seats without explanation. I am extremely dissatisfied with this experience. I expect the airline to do better, and I am requesting a full refund for the seat selection fees we paid.

1 hour delay meant missed my connecting flight and 1st day of holiday

The flight was over 1 hour late taking off ,when I arrived in Abu Dhabi ,I missed my connecting flight to Bangkok so I had to wait almost 6 hours for my flight arriving in Bangkok at 6:30 am ,So I missed a whole day of my vacation and my hotel room sat empty so I paid for hotel days that I was not there. In Abu Dhabi there was a woman that worked the desk at transfers that was so professional, courteous , helpful,and may I say absolutely beautiful .she got me food vouchers for my layover and was a very calming presence. Besides that I will never use Etihad again I will pay the Xtra money . I'm sure they won't read or see this but it's my "2 cents" I'll use an airline that respects me and my hard earned dollars

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

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

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

The business class experience is fantastic. The crew were polite but often unavailable even when I tried to call them! I even found myself bringing my used dishes and cutlery up to the crew because no one had come to collect it after over an hour.

Very unfriendly team. It was very difficult to get a cup of coffee. Legroom was extremely small. Old, dilapidated plane.

Very very bad service very tight seats never ever flying with Etihad again

The seat was not functional. Very uncomfortable to sit upright for that many hours😢. There was no legroom. Can’t move the legs or the body. We should have the option to pick our seats. There was no need to call customer support team and have them pick and we pay for the premium seats. When I called the CST regarding the seats, their response is gaslighting. Total disappointment. We have paid to be tortured by Etihad Airlines.

Weren’t even given earphones to use the entertainment system

The meals were not the greatest and lacking of appetite but everything else was spot on

Overall, excellent: check-in, boarding, service, and food. The Business Class seating is a little less private and spacious than the world's premier airlines, but still very good for a long haul flight.

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

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

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

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 was delayed for almost 5 hours, but I understand that it was not up to the company, however how they could handle the situation better, they never apologized for that delay, moreover despite passengers being there for 7 hours only thing they did was to give a bowl of instant noodles, afterwards on the plane tiny snacks, people were there starting from lunch time and we’ve arrived to destination at almost midnight

Everything you need to know for your flight from Heathrow to Cambodia

Information on your arrival and departure airports