Cheap flights from Southeast Asia to Siem Reap from £71

The month of June is, on average, the cheapest month to fly to Siem Reap from Southeast Asia, with most prices found around £39. If you don’t want to visit Siem Reap in June, then you should wait until April to fly from Southeast Asia, when ticket prices are also cheap, with an average price of £43.

On average, the least expensive day to fly to Siem Reap from Southeast Asia is on a Thursday. momondo users have found tickets for Thursday departures for as low as £141. However, this price may fluctuate depending on the airline, the season, and holidays. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around £228. These prices are subject to change though, so be sure to set up a Price Alert for flights to Siem Reap.

The cheapest time of day to fly to Siem Reap is at midday when flights can be purchased for as low as £143. In contrast, the most expensive time of day to depart to Siem Reap is in the afternoon when prices are around £161.

Fly from Bangkok Don Mueang Intl to Siem Reap–Angkor Intl for the best Southeast Asia - Siem Reap–Angkor Intl flight prices

You are more likely to see cheaper flights to Siem Reap from Southeast Asia when booking weeks ahead of your departure date. In general, you can expect to find flights to Siem Reap for around £151 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Siem Reap from Southeast Asia for as low as £143 on momondo.

Bangkok Airways, Cambodia Angkor Air, and Vietnam Airlines are the most popular carriers operating from Southeast Asia to Siem Reap–Angkor Intl

Thai AirAsia, Cambodia Angkor Air and Singapore Airlines are the top three most popular airlines that fly to Siem Reap from Southeast Asia according to our data. Thai AirAsia is the first choice among our users, with 57% of people opting to fly with this airline when travelling to Siem Reap. Keep in mind that there are 6 different airlines that fly to Siem Reap on a routine basis, so you have a few additional options to choose from.

As of May 2026, 51 flights take off from Southeast Asia and land in Siem Reap each day. The most common flight departure time for this route is 17:00, with 57% of daily flights taking off at midday.

The number of flights available between Southeast Asia and Siem Reap is 360 per week as of May 2026. The most frequent departure day is Fri, with 16% of weekly flights leaving on this day.