AA 3155 then AA 4547 at O'Hare
Miami → Chicago → Boston
Timetable, Chicago time
09:32AA 3155 from Miami at the gate
10:54AA 4547 to Boston leaves the gate
1 h 22 apart on the timetable
Today
From the airport’s board at 16:17 Chicago time
08:52AA 3155 reached the gate40 min early
11:05AA 4547 left the gate11 min late
2 h 13 between the gates
The last days
AA 3155 and AA 4547 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.