Cheap flights from London to Siem Reap from £338

Travelers frequently search for route combinations, such as London and Istanbul, Tirana, Barcelona, Jeddah, Tel Aviv, Prague, Paris, Athens, Bucharest, Málaga, Marrakesh, Bangkok, Rome, Chișinău, Madrid, Budapest, Edinburgh, New York, Oslo, Agadir.

Travelers frequently search for route combinations, such as Siem Reap and Bangkok, Phnom Penh, Hanoi, Phuket City, Singapore, Phuket Province, Chiang Mai, Ho Chi Minh City, Kuala Lumpur, Da Nang, Sihanoukville Province, Vientiane, Krabi, Bali, Manila, Denpasar, Ko Samui, Perth, Surat Thani Province, Melbourne.

London is mainly served by Heathrow. But there are other airports nearby, including Gatwick, London Stansted, Luton, London City, London Southend, RAF Northolt.

The main airport in London is Heathrow. It is also served by Birmingham, Bristol, East Midlands, Southampton, Cardiff, Bournemouth, Exeter, Norwich, Humberside.

The main airport in Siem Reap is Siem Reap International. It is also served by Phnom Penh International.

Currently, you can fly between London and Siem Reap with Thai AirAsia, Thai Airways, Air India Limited, IndiGo Airlines, AirAsia.

If you don’t have specific dates for your trip between London and Siem Reap, you can enter a date range into the departure and return fields. Most carriers on the Kiwi.com website allow you to search and book up to six months from the day of your search. Order the search results by the best, cheapest, or fastest route, or find the cheapest outbound and return combination in the pricing table.

Traveling between London and Siem Reap, you can choose between direct (nonstop) flights or flights with one or more stops. You can select the number of stops on your journey, including an overnight stopover, and the duration of the stopover. What’s more, you can also select where you want to have your stopover. Want to say "Hi" to a friend in another city en route to your destination? Or fancy a quick round of shopping? Go Multi-City or Nomad and add places to your search that you wish to visit.

There are a number of airports in and around London. The main one is Heathrow and other nearby airports include Birmingham, Bristol, East Midlands, Southampton, Cardiff, Bournemouth, Exeter, Norwich, Humberside