AA 4121 then AA 3681 at O'Hare
Green Bay → Chicago → Springfield Branson National
Timetable, Chicago time
07:27AA 4121 from Green Bay at the gate
08:18AA 3681 to Springfield Branson National leaves the gate
51 min apart on the timetable
The last days
AA 4121 and AA 3681 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.