AA 9908 then UA 5582 at O'Hare
Milwaukee → Chicago → Nashville
Timetable, Chicago time
08:20AA 9908 from Milwaukee at the gate
14:05UA 5582 to Nashville leaves the gate
5 h 45 apart on the timetable
The last days
AA 9908 and UA 5582 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.