Most travellers find the cheapest return flights to Hanoi when choosing a flight departing in September.
Most flyers found that booking flight tickets 50 days in advance of their planned departure date is, on average, the best time to get cheap flights to Hanoi.
From most locations, the cheapest day to fly to Hanoi is Wednesday. Most users found that departing on a Saturday was most expensive.
Typically, cheap prices to Hanoi are most often found for evening flights. Cheap prices are less likely for morning flights.