Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Hanoi to Magaluf as you normally would.
For a flight from Hanoi to Magaluf, you will be flying from Noibai. Hanoi Noibai (HAN) is just 22.8 km from the center of the city. Noibai is the only Hanoi airport and it handles 0 outbound flights to Magaluf per day. 0 airlines have flights to Magaluf from Hanoi Noibai on a regular basis.