AA 4121 then AA 1073 at O'Hare
Green Bay → Chicago → Buffalo
Timetable, Chicago time
07:27AA 4121 from Green Bay at the gate
18:59AA 1073 to Buffalo leaves the gate
11 h 32 apart on the timetable
The last days
AA 4121 and AA 1073 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.
Later flights to Buffalo
No later flight to Buffalo on the timetable.