AA 4156 then UA 2723 at O'Hare
Green Bay → Chicago → Omaha
Timetable, Chicago time
16:10AA 4156 from Green Bay at the gate
19:59UA 2723 to Omaha leaves the gate
3 h 49 apart on the timetable
The last days
AA 4156 and UA 2723 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.