Flight Mactan-Cebu International Airport departs from Cebu Mactan-Cebu International Airport at 02:00 and arrives at Busan Gimhae International Airport at 07:00.
The flighttime is about 4h 00m. The distance travelled ("as the bird flies"): 1722 Km. So the average speed is roughly 430 Km.
There is an 1 hour time difference between Cebu and Busan