Cheap flights from Bangkok to Siem Reap from £67

The month of June is, on average, the cheapest month to fly to Siem Reap from Bangkok, 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 Bangkok, when ticket prices are also cheap, with an average price of £133.

On average, the least expensive day to fly to Siem Reap from Bangkok 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 £189. 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 £138. In contrast, the most expensive time of day to depart to Siem Reap is in the afternoon when prices are around £162.

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

You are more likely to see cheaper flights to Siem Reap from Bangkok when booking weeks ahead of your departure date. In general, you can expect to find flights to Siem Reap for around £146 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 Bangkok for as low as £140 on momondo.

There are 2 cabin classes available to choose from on Bangkok 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.

Bangkok Airways and Cambodia Angkor Air are the most popular carriers operating from Bangkok to Siem Reap–Angkor Intl

Thai AirAsia, Bangkok Airways and Thai Airways are the top three most popular airlines that fly to Siem Reap from Bangkok according to our data. Thai AirAsia is the first choice among our users, with 80% of people opting to fly with this airline when travelling to Siem Reap. Keep in mind that there are 3 different airlines that fly to Siem Reap on a routine basis, so you have a few additional options to choose from.

Historically, on average around 20% of flights between Bangkok and Siem Reap have experienced a delay on any given week. The average delay length over the past 12 months has been 83 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights departing in the evening have, in the past, seen delays more frequently in comparison.

Tuesday is statistically the day of the week that experiences the fewest delays on this flight route. Friday has historically seen more delays on average compared to the rest of the week.

According to our data, Thai Airways have had the fewest delays on this route over the last 12 months, with about 9% of their flights experiencing any sort of delay.

As of March 2026, there are 38 flights per day flying from Bangkok to Siem Reap. The most common time of day flights depart is 17:00, with 55% of flights taking off at midday.

271 flights are operational weekly from Bangkok to Siem Reap as of March 2026. The most popular departure day for this route is Tue, with 15% of flights per week taking off on this day.