Cheap flights from Siem Reap to Hanoi from $103

The cheapest month to fly to Hanoi from Siem Reap is in September. Flight prices, which tend to average around $127, 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 July is your next best option. Flight prices from Siem Reap to Hanoi during July average around $132.

According to our data, Wednesday is the cheapest day to fly to Hanoi from Siem Reap. The lowest ticket price found for a Wednesday departure recently was $174. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Be sure to avoid booking your departure on a Tuesday as prices are generally higher than usual. According to our data, the average ticket price to Hanoi on Tuesday is $320.

Our most recent data shows that the best time of day to fly to Hanoi is in the evening. Flights from Siem Reap to Hanoi during this time can be as low as $181. Try not to purchase tickets in the afternoon because they tend to be around $600. Of course, these prices can vary depending on the time of year and what airport you fly to.

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 $163 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 $152 on momondo.

There are 3 cabin classes available to choose from on Siem Reap–Angkor Intl to Hanoi Noibai 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 25% 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 in the evening have, in the past, seen delays more frequently in comparison.

Monday is statistically the day of the week which experiences the fewest number of 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 have had the least number of delays on this route over the last 12 months; with about 23% of their flights experiencing any sort of delay.

As of March 2026, there are 5 flights per day flying from Siem Reap to Hanoi. The most common time of day flights depart is 5:00PM, with 62% of flights taking off in the afternoon.

The number of flights available between Siem Reap and Hanoi is 40 per week as of March 2026. The most frequent departure day is Sat, with 20% of weekly flights leaving on this day.