When flying from Hanoi to Sanya, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
When traveling, it's generally smart to pack in preparation for rain or any other conditions that may arise. The rainfall in Hanoi is roughly greater than that of Sanya. You can assume this to be the case over the next 14 days.
Some of our airline partners flying from Hanoi Noibai to Sanya Phoenix Intl have new flexible policies in place due to COVID-19. China Southern is one of the carriers where you may find flexible change policies. You can use our site to filter for airlines like China Southern with this kind of flexibility.
Expect the weather to be around 34 °C on average in June. As the temperature peaks, try to get your plans done early, as flight price and availability will have an impact on your travels. The climate in Sanya is generally colder than in Hanoi.