AA 2819 then AA 4547 at O'Hare
New York JFK → Chicago → Boston
Timetable, Chicago time
09:30AA 2819 from New York JFK at the gate
10:54AA 4547 to Boston leaves the gate
1 h 24 apart on the timetable
Today
From the airport’s board at 12:49 Chicago time
08:46AA 2819 reached the gate44 min early
10:47AA 4547 left the gate7 min early
2 h 01 between the gates
The last days
AA 2819 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.