AA 4456 then AA 3160 at Boston
Indianapolis → Boston → Chicago O'Hare
Timetable, Boston time
11:17AA 4456 from Indianapolis at the gate
18:16AA 3160 to Chicago O'Hare leaves the gate
6 h 59 apart on the timetable
The last days
AA 4456 and AA 3160 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.