Cheap flights from Southeast Asia to Siem Reap from £73

The month of July is, on average, the cheapest month to fly to Siem Reap from Southeast Asia, with most prices found around £114. If you don’t want to visit Siem Reap in July, then you should wait until August to fly from Southeast Asia, when ticket prices are also cheap, with an average price of £142.

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 £143. 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 £237. 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 in the evening when flights can be purchased for as low as £151. In contrast, the most expensive time of day to depart to Siem Reap is in the morning when prices are around £177.

Fly from Singapore Changi 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 £168 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 £151 on momondo.

There are 2 cabin classes available to choose from on Southeast Asia to Siem Reap flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

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

Thai AirAsia, Vietnam Airlines and Cambodia Angkor Air 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 40% of people opting to fly with this airline when travelling to Siem Reap. Keep in mind that there are 5 different airlines that fly to Siem Reap on a routine basis, so you have a few additional options to choose from.

As of September 2026, 52 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 55% of daily flights taking off at midday.

The number of flights available between Southeast Asia and Siem Reap is 366 per week as of September 2026. The most frequent departure day is Wed, with 15% of weekly flights leaving on this day.