Cheap flights from Siem Reap to Hanoi from C$ 143

The cheapest month to fly to Hanoi from Siem Reap is in September. Flight prices, which tend to average around C$ 179, are often lower during this time because this is during the off-season. If you’re not able to fly to Hanoi in September, then March is your next best option. Flight prices from Siem Reap to Hanoi during March average around C$ 211.

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

You are more likely to see cheaper flights to Hanoi from Siem Reap when booking weeks ahead of your departure date. In general, you can expect to find flights to Hanoi for around C$ 249 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Hanoi from Siem Reap for as low as C$ 203 on momondo.

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

Historically, on average around 24% of flights between Siem Reap and Hanoi have experienced a delay on any given week. The average delay length over the past 12 months has been 109 minutes.

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

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

According to our data, Vietnam Airlines has had the least delays on this route over the last 12 months, with about 23% of their flights experiencing any sort of delay.

As of June 2026, there are 2 flights per day flying from Siem Reap to Hanoi. The most common time of day flights depart is 6:00p.m., with 100% of flights taking off in the evening.

As of June 2026, 19 flights take off from Siem Reap and land in Hanoi each week. The most common flight departure day for this route is Fri, with 21% of weekly flights taking off on this day.