Cheap flights from Hanoi to Siem Reap from $61

If you don’t want to visit Siem Reap in June, then you should wait until September to fly from Hanoi, when ticket prices are also cheap, with an average price of $149.

The cheapest day to depart from Hanoi to Siem Reap is on a Monday. Travelers who choose to depart for Siem Reap on a Monday will often find tickets for as low as $175. If your travel schedule is flexible, try to avoid departing on a Wednesday because tickets tend to average around $214. These prices are subject to change though, so be sure to set up a Price Alert for flights to Siem Reap.

Fly from Hanoi Noibai to Siem Reap–Angkor Intl for the best Hanoi Noibai - Siem Reap–Angkor Intl flight prices

You are more likely to see cheaper flights to Siem Reap from Hanoi when booking weeks ahead of your departure date. In general, you can expect to find flights to Siem Reap for around $187 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Siem Reap from Hanoi for as low as $155 on momondo.

There are 3 cabin classes available to choose from on Hanoi Noibai 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.

As of February 2026, prices for Hanoi to Siem Reap flights are approximately 19% more expensive when compared to flights at the same time last year.

Historically, on average around 32% of flights between Hanoi and Siem Reap have experienced a delay on any given week. The average delay length over the past 12 months has been 101 minutes.

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

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

According to our data, Cambodia Angkor Air have had the least number of delays on this route over the last 12 months; with about 18% of their flights experiencing any sort of delay.

As of February 2026, 6 flights take off from Hanoi and land in Siem Reap each day. The most common flight departure time for this route is 3:00PM, with 91% of daily flights taking off in the afternoon.

46 flights are operational weekly from Hanoi to Siem Reap as of February 2026. The most popular departure day for this route is Thu, with 20% of flights per week taking off on this day.