When flying from Cebu to Atlantic City, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
Atlantic City (ACY), located 16.8 km from the city center, is the airport you fly into when you book flights from Cebu to Atlantic City.
This is defined as Cebu City Mactan Intl Airport (CEB) and Atlantic City Airport (ACY). Codes like Atlantic City Airport are often used to just call airports uniquely.