AA 5918 then AA 6551 at Philadelphia
Portland (Maine) → Philadelphia → Atlantic City
Timetable, Philadelphia time
12:55AA 5918 from Portland (Maine) at the gate
17:30AA 6551 to Atlantic City leaves the gate
4 h 35 apart on the timetable
The last days
AA 5918 and AA 6551 weren’t both flown 15 min to 12 h apart in the last 21 days.
Statistics from past flights, not live flight information. Always check times and your connection with your airline, and don’t base travel or booking decisions on these numbers.