AA 3523 then AA 4932 at O'Hare
Baltimore → Chicago → Richmond
Timetable, Chicago time
12:59AA 3523 from Baltimore at the gate
16:29AA 4932 to Richmond leaves the gate
3 h 30 apart on the timetable
The last days
AA 3523 and AA 4932 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.