Cheap flights from London to Siem Reap from £274

How far is London to Siem Reap–Angkor Intl by plane?

The straight-line distance from London to Siem Reap–Angkor Intl is 6077.6 mi. By plane, this route typically takes 16h 20m.

When did momondo last update prices for flights from London to Siem Reap–Angkor Intl Airport?

Prices for flights from London to Siem Reap–Angkor Intl Airport are updated daily.

How many operators does momondo search for flights from London to Siem Reap–Angkor Intl Airport?

As of August 2026, there are 4 operators available to choose from for flights from London to Siem Reap–Angkor Intl Airport.

How old do you have to be to fly from London to Siem Reap–Angkor Intl Airport?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from London to Siem Reap–Angkor Intl Airport.

What documentation or ID do you need to fly to Siem Reap–Angkor Intl Airport?

The travel and health documents you'll need for your trip to Siem Reap–Angkor Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Siem Reap–Angkor Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

What is the most popular airline from London to Siem Reap?

Based on momondo bookings for this flight route, the most popular airline on flight routes from London to Siem Reap is Singapore Airlines (61% of total bookings). The next most popular airlines are Vietnam Airlines (16%), British Airways (15%), and Thai Airways (8%).