Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Philippines to Belize City as you normally would.
This is defined as Manila Ninoy Aquino Intl Airport (MNL) and Belize City Philip S.W.Goldson Airport (BZE). Codes like Belize City Philip S.W.Goldson Airport are often used to just call airports uniquely. Ready for more IATA code knowledge? These are related airports for your current travel destination: Belize City Airport (TZA), San Pedro Town Airport (SPR), Caye Caulker Airport (CUK), Belmopan Airport (BCV), Dangriga Airport (DGA).