AA 4708 then AA 927 at Boston
Harrisburg → Boston → Chicago O'Hare
Timetable, Boston time
08:34AA 4708 from Harrisburg at the gate
19:23AA 927 to Chicago O'Hare leaves the gate
10 h 49 apart on the timetable
The last days
AA 4708 and AA 927 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.