Cheap flights from Hong Kong to Hanoi from C$ 135

The cheapest month to fly to Hanoi from Hong Kong is in January. Flight prices, which tend to average around C$ 199, are often lower during this time because this is during the off-season. If you’re not able to fly to Hanoi in January, then November is your next best option. Flight prices from Hong Kong to Hanoi during November average around C$ 214.

On average, the least expensive day to fly to Hanoi from Hong Kong is on a Monday. momondo users have found tickets for Monday departures for as low as C$ 168. However, this price may fluctuate depending on the airline, the season, and holidays. Flights from Hong Kong to Hanoi on a Tuesday will generally be more expensive and average around C$ 508. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

According to our data, the cheapest time of day to fly to Hanoi is in the evening. momondo users have found flights departing from Hong Kong to Hanoi in the evening for as low as C$ 168. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In contrast, the most expensive time of day to depart to Hanoi is at noon when prices are around C$ 293.

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 C$ 282 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 C$ 243 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 114 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 has had the least delays on this route over the last 12 months, with about 12% of their flights experiencing any sort of delay.

The number of flights available between Hong Kong and Hanoi is 6 per day as of September 2026. The most frequent departure time is 4:00p.m., with 65% of daily flights leaving in the afternoon.

As of September 2026, 42 flights take off from Hong Kong and land in Hanoi each week. The most common flight departure day for this route is Tue, with 19% of weekly flights taking off on this day.