AA 4191 then AA 3544 at O'Hare
Rochester (ROC) → Chicago → Detroit
Timetable, Chicago time
12:37AA 4191 from Rochester (ROC) at the gate
13:30AA 3544 to Detroit leaves the gate
53 min apart on the timetable
The last days
AA 4191 and AA 3544 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.