Cheap flights from Sydney to Hanoi from $432

The cheapest month to fly to Hanoi from Sydney is in May. Flight prices, which tend to average around $801, 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 May, then flying in November is also cheap. Prices for this month can be found on momondo for an average of $845.

The cheapest day to depart from Sydney to Hanoi is on a Friday. Travellers who choose to depart for Hanoi on a Friday will often find tickets for as low as $1,140. When flying out on a Tuesday, the most expensive travel day of the week, you can expect to see flight prices from Sydney to Hanoi for around $1,412.

According to our data, the cheapest time of day to fly to Hanoi is at midday. momondo users have found flights departing from Sydney to Hanoi at midday for as low as $1,144. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the afternoon are often more expensive, with an average ticket price of $1,335.

Fly from Sydney Kingsford Smith to Hanoi Noibai for the best Sydney Kingsford Smith - Hanoi Noibai flight prices

You are more likely to see cheaper flights to Hanoi from Sydney when booking weeks ahead of your departure date. In general, you can expect to find flights to Hanoi for around $1,032 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 Sydney for as low as $924 on momondo.

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

VietJet Air, Cathay Pacific, and Batik Air are the most popular carriers operating from Sydney Kingsford Smith to Hanoi Noibai

Vietnam Airlines, VietJet Air and China Southern are the top three most popular airlines that fly to Hanoi from Sydney according to our data. Vietnam Airlines is the first choice among our users, with 48% of people opting to fly with this airline when travelling to Hanoi. Keep in mind that there are 12 different airlines that fly to Hanoi on a routine basis, so you have a few additional options to choose from.

Historically, on average around 19% of flights between Sydney and Hanoi have experienced a delay on any given week. The average delay length over the past 12 months has been 138 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.

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

According to our data, Vietnam Airlines have had the fewest delays on this route over the last 12 months, with about 15% of their flights experiencing any sort of delay.

Ho Chi Minh City (SGN) was the most common stop: 57% of momondo users choosing one-stop flights on this route connected there.

Flights via Xiamen (XMN) offer the lowest average return price of $689.

Flights connecting via Hong Kong (HKG) have the shortest average one-way travel time: 13h 48m.

Hong Kong (HKG) has the shortest average stopover time for this route: 2h 31m.

The number of flights available between Sydney and Hanoi is 1 per day as of November 2026. The most frequent departure time is 14:00, with 100% of daily flights leaving in the afternoon.

7 flights are operational weekly from Sydney to Hanoi as of November 2026. The most popular departure day for this route is Mon, with 43% of flights per week taking off on this day.