AA 3523 then AA 1624 at O'Hare
Baltimore → Chicago → New York JFK
Timetable, Chicago time
12:59AA 3523 from Baltimore at the gate
16:31AA 1624 to New York JFK leaves the gate
3 h 32 apart on the timetable
The last days
AA 3523 and AA 1624 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.