The best month to fly between Hanoi and Singapore is August and the most expensive month to fly is February. (Average prices, based on 457 datapoints.)
The best day to arrive at Hanoi is Monday and it would be best to avoid Friday, as prices are on average 36.61% higher than on Monday. (Average prices, based on 219261 datapoints.)
The cheapest airline flying from Hanoi to Singapore is VietJet Air. They are 27% cheaper than Vietnam Airlines. (Average prices, based on 460 datapoints.)