£344 Find Cheap Flights from London to Siem Reap – Compare and Save

In the last 5 days, the lowest price for a flight from London Heathrow Airport to Siem Reap was £344 for a one-way ticket and £589 for a return.

London and Siem Reap are both served by 1 main airport. You will leave London from London Heathrow and will be arriving at Siem Reap–Angkor Intl.

We unfortunately don’t have that data for this specific route.

SkyTeam, and Star Alliance are the airline alliances operating flights between London and Siem Reap, with SkyTeam being the most commonly used for this route.

The two airlines most popular with KAYAK users for flights from London to Siem Reap are Singapore Airlines and Thai Airways. With an average price for the route of £778 and an overall rating of 8.2, Singapore Airlines is the most popular choice. Thai Airways is also a great choice for the route, with an average price of £992 and an overall rating of 7.9.

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 to Siem Reap.

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Siem Reap from London is likely to change within 7 days, so travellers know whether to wait or book now.

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to Siem Reap with an airline and back to London with another airline.

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