Cheap flights from Phnom Penh to Siem Reap from £36

The month of July is, on average, the cheapest month to fly to Siem Reap from Phnom Penh, with most prices found around £76. If you don’t want to visit Siem Reap in July, then you should wait until August to fly from Phnom Penh, when ticket prices are also cheap, with an average price of £81.

On average, the least expensive day to fly to Siem Reap from Phnom Penh is on a Friday. momondo users have found tickets for Friday departures for as low as £108. 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 £154. 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 £125. In contrast, the most expensive time of day to depart to Siem Reap is at midday when prices are around £162.

Fly from Phnom Penh Techo Intl to Siem Reap–Angkor Intl for the best Phnom Penh Techo Intl - Siem Reap–Angkor Intl flight prices

You are more likely to see cheaper flights to Siem Reap from Phnom Penh when booking weeks ahead of your departure date. In general, you can expect to find flights to Siem Reap for around £123 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 Phnom Penh for as low as £97 on momondo.

There is only 1 cabin class available to choose from on Phnom Penh to Siem Reap flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

3 flights are operational daily from Phnom Penh to Siem Reap as of October 2026. The most popular departure time for this route is 16:00, with 37% of flights per day taking off at midday.

As of October 2026, there are 27 flights per week flying from Phnom Penh to Siem Reap. The most common day of the week flights depart is Fri, with 26% of flights taking off on this day.