
Anyway, you can catch the hot air balloon flights from 5:30 to 7 a.m. daily during the festival. That means leaving Manila by 4 a.m. to be sure you make it on time. Take into consideration that the later you arrive, the harder to find parking.
The schedule also mentions flights late in the afternoon but I'm not quite sure about this since the evenings are usually for the night glow event which you should not miss. Night glow is scheduled for Saturday, 6:45 to 7:30 p.m. The full schedule of the festival is here.