AA 4352 then AA 927 at Boston
Indianapolis → Boston → Chicago O'Hare
Timetable, Boston time
17:29AA 4352 from Indianapolis at the gate
19:23AA 927 to Chicago O'Hare leaves the gate
1 h 54 apart on the timetable
Boston’s board gives an arrival time for only about 59% of its flights, so many days show no gate time.
The last days
AA 4352 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.