UA 5902 then DL 796 at O'Hare
Madison → Chicago → Atlanta
Timetable, Chicago time
06:20UA 5902 from Madison at the gate
15:00DL 796 to Atlanta leaves the gate
8 h 40 apart on the timetable
Today
From the airport’s board at 10:27 Chicago time
06:20UA 5902 due at the gate, no estimate yet
15:00DL 796 due to leave, no estimate yet
8 h 40 between the gates, on these times
The last days
UA 5902 and DL 796 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.