AA 4151 then AA 3909 at O'Hare
Jacksonville → Chicago → Green Bay
Timetable, Chicago time
14:29AA 4151 from Jacksonville at the gate
18:46AA 3909 to Green Bay leaves the gate
4 h 17 apart on the timetable
The last days
AA 4151 and AA 3909 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.