AA 1998 then SY 8719 at Philadelphia
Cleveland → Philadelphia → Cincinnati
Timetable, Philadelphia time
07:29AA 1998 from Cleveland at the gate
13:30SY 8719 to Cincinnati leaves the gate
6 h 01 apart on the timetable
The last days
AA 1998 and SY 8719 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.