Search for cheap flights and last-minute deals with Netflights. We've scanned all the flights from London Heathrow to Phnom Penh, across the 13 airlines that offer this route. We've found that 20 / May / 2025 is the cheapest date to travel at the moment, but it's best to go through the results to see which flight suits you.
The most popular airlines offering flights to Phnom Penh are Emirates, Thai Airways International & Qatar Airways. Emirates is the most popular one, but that doesn’t mean their flights will be the cheapest. If you can't find a flight time that suits you, why not look at flying out from a different airport?
The distance between London Heathrow to Phnom Penh is 10044 km. Normally, it takes about 18 hrs 35 mins to fly, and you can definitely expect the journey to be at least 14 hrs 5 mins. You can see the various flight times in the results.
If you want to travel in November, it's best to book your flights early, as this is peak season in Phnom Penh. The cheapest month to fly is normally June – try searching three to four months prior to then to get a bargain. You can also search by month, which will reveal the cheapest time of the week to fly.
