Cheap flights from Southeast Asia to Siem Reap from £73

The month of June is, on average, the cheapest month to fly to Siem Reap from Southeast Asia, with most prices found around £121. If you don’t want to visit Siem Reap in June, then you should wait until May to fly from Southeast Asia, when ticket prices are also cheap, with an average price of £133.

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 £142. 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 £190. 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 £142. In contrast, the most expensive time of day to depart to Siem Reap is in the afternoon when prices are around £162.

Fly from Phuket City 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 £147 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 £140 on momondo.

There are 3 cabin classes available to choose from on Southeast Asia to Siem Reap–Angkor Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

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

Thai AirAsia, Singapore Airlines and Bangkok Airways 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 67% 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 March 2026, 62 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 47% of daily flights taking off at midday.

The number of flights available between Southeast Asia and Siem Reap is 439 per week as of March 2026. The most frequent departure day is Tue, with 15% of weekly flights leaving on this day.