Cheap flights from London to Siem Reap from £379

When did momondo last update prices for flights from London to Siem Reap?

Prices for flights from London to Siem Reap are updated daily.

How many operators does momondo search for flights from London to Siem Reap?

As of May 2026, there are 5 operators available to choose from for flights from London to Siem Reap.

How old do you have to be to fly from London to Siem Reap?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London to Siem Reap.

What documentation or ID do you need to fly to Siem Reap?

The required travel and health documents for your Siem Reap trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Siem Reap. We recommend that you seek guidance from your airline or a reliable third party such as IATA.