Cheap flights from Bangkok to Siem Reap from $143

The cheapest month to fly to Siem Reap from Bangkok is in April. Flight prices, which tend to average around $113, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of April, then book flights to Siem Reap from Bangkok during October instead. Flights to Siem Reap in October, while not as cheap as those in April, still average around $118.

The cheapest day to depart from Bangkok to Siem Reap is on a Thursday. Travellers who choose to depart for Siem Reap on a Thursday will often find tickets for as low as $272. On the other hand, Wednesday is the most expensive day to depart from Bangkok because it is more convenient for both business and leisure travellers. As a result, prices tend to be around $366.

Flying to Siem Reap from Bangkok at midday is the least expensive time of day to depart. momondo users have found prices as low as $275 when looking at flights departing at midday. Try not to purchase tickets in the afternoon because they tend to be around $366. Of course, these prices can vary depending on the time of year and what airport you fly to.

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 $284 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 $263 on momondo.

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 84 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, Bangkok Airways have had the fewest delays on this route over the last 12 months, with about 12% of their flights experiencing any sort of delay.

The number of flights available between Bangkok and Siem Reap is 31 per day as of May 2026. The most frequent departure time is 10:00, with 60% of daily flights leaving at midday.

223 flights are operational weekly from Bangkok to Siem Reap as of May 2026. The most popular departure day for this route is Tue, with 16% of flights per week taking off on this day.