Cheap flights from Hong Kong to Hanoi from $139

The cheapest month to fly to Hanoi from Hong Kong is in January. Flight prices, which tend to average around $208, are often lower during this time because this is during the off-season. If you aren’t able to travel to Hanoi during the month of January, then flying in November is also cheap. Prices for this month can be found on momondo for an average of $229.

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 $290 when searching weeks before you fly. 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 $247 on momondo.

There are 2 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.

Historically, on average around 26% 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 113 minutes.

Generally, flights departing in the morning 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. Friday has historically seen more delays on average compared to the rest of the week.

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

As of September 2026, 5 flights take off from Hong Kong and land in Hanoi each day. The most common flight departure time for this route is 16:00, with 62% of daily flights taking off in the afternoon.

40 flights are operational weekly from Hong Kong to Hanoi as of September 2026. The most popular departure day for this route is Mon, with 28% of flights per week taking off on this day.