Search for cheap flights and last-minute deals with Netflights. We've scanned all the flights from London Heathrow to Siem Reap, across the one airlines that offer this route.
There are 22 flights from London Heathrow to or via Siem Reap every week. Out of the one available airlines, the most popular ones are Thai Airways International. But that doesn’t necessarily mean they’ll be the best option for your travel dates. To see as many flights as possible, try widening your search to include other departure airports.
The distance between London Heathrow to Siem Reap is 9811 km. Normally, it takes about 13 hrs 55 mins to fly, and you can definitely expect the journey to be at least 13 hrs 55 mins. You can see the various flight times in the results.
The cheapest month to fly to Siem Reap is May, while December is when the prices of flights, hotels and car hire will be at their highest. If you need somewhere to stay for your trip to Cambodia, take a look at our accommodation options.