Yes, there are multiple flights from Noi-Bai to Venice for under 29,981,550₫. The cheapest flight booked recently is on Air France for just 28,482,472₫, but on average you can expect to pay 28,597,786₫.
There are no direct flights from Noi-Bai to Venice, but Cheapflights can provide you with all the information you need to find the fastest route with the fewest stops.
You can imagine temperatures to be in the 34 °C range in June. The weather in Venice is generally colder than Hanoi's. As flight availability is subject to become more limited as peak season approaches it is ideal to book in a timely manner.
There are many flights that can get you from Noi-Bai to Venice in 25h 25m. Fly via Air France or Alitalia to get the fastest option. This flight may include one or multiple stops.
Cheapflights users have booked flights from Noi-Bai to Venice round-trip from 28,482,472₫. Another airline that can offer you cheap pricing is Alitalia.