UA 5902 then AA 9922 at O'Hare
Madison → Chicago → Charlotte
Timetable, Chicago time
06:20UA 5902 from Madison at the gate
10:00AA 9922 to Charlotte leaves the gate
3 h 40 apart on the timetable
Today
From the airport’s board at 02:43 Chicago time
06:20UA 5902 due at the gate, no estimate yet
10:00AA 9922 due to leave, no estimate yet
3 h 40 between the gates, on these times
The last days
UA 5902 and AA 9922 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.