Cheap flights from Hong Kong to Hanoi from $137

The cheapest month to fly to Hanoi from Hong Kong is in November. Flight prices, which tend to average around $142, are often lower during this time because this is during the off-season. If you’re not able to fly to Hanoi in November, then October is your next best option. Flight prices from Hong Kong to Hanoi during October average around $146.

According to our data, Wednesday is the cheapest day to fly to Hanoi from Hong Kong. The lowest ticket price found for a Wednesday departure recently was $151. 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 Monday as prices are generally higher than usual. According to our data, the average ticket price to Hanoi on Monday is $209.

Our most recent data shows that the best time of day to fly to Hanoi is in the morning. Flights from Hong Kong to Hanoi during this time can be as low as $143. Try not to purchase tickets at noon because they tend to be around $296. Of course, these prices can vary depending on the time of year and what airport you fly to.

Fly from Hong Kong Intl to Hanoi Noibai for the best Hong Kong Intl - Hanoi Noibai flight prices

You are more likely to see cheaper flights to Hanoi from Hong Kong when booking weeks ahead of your departure date. In general, you can expect to find flights to Hanoi for around $180 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Hanoi from Hong Kong for as low as $136 on momondo.

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

Vietnam Airlines, Cebu Pacific, and China Airlines are the most popular carriers operating from Hong Kong Intl to Hanoi Noibai

HK Express, Vietnam Airlines and Cathay Pacific are the top three most popular airlines that fly to Hanoi from Hong Kong according to our data. HK Express is the first choice among our users, with 74% of people opting to fly with this airline when traveling to Hanoi. Keep in mind that there are 3 different airlines that fly to Hanoi on a routine basis, so you have a few additional options to choose from.

Historically, on average around 24% of flights between Hong Kong 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 morning 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. Friday has historically seen more delays on average compared to the rest of the week.

According to our data, HK Express have had the least number of delays on this route over the last 12 months; with about 13% of their flights experiencing any sort of delay.

As of May 2026, there are 9 flights per day flying from Hong Kong to Hanoi. The most common time of day flights depart is 4:00PM, with 64% of flights taking off in the afternoon.

63 flights are operational weekly from Hong Kong to Hanoi as of May 2026. The most popular departure day for this route is Sat, with 19% of flights per week taking off on this day.