Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Yogyakarta to Da Nang as you normally would.
Related info for your journey
Useful info, stats and facts about Yogyakarta to Da Nang flights.
Yogyakarta Adisutjipto Airport is JOG and Da Nang Airport is DAD. These codes are created by the International Air Transport Association (IATA) and airlines use them to identify the departing and arrival airports in the flight routes they service.