AA 1239 then DL 796 at O'Hare
Boston → Chicago → Atlanta
Timetable, Chicago time
10:30AA 1239 from Boston at the gate
15:00DL 796 to Atlanta leaves the gate
4 h 30 apart on the timetable
Today
From the airport’s board at 21:19 Chicago time
09:56AA 1239 reached the gate34 min early
16:17DL 796 left the gate1 h 17 late
6 h 21 between the gates
The last days
AA 1239 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.