AA 9782 then DL 2738 at O'Hare
Boston → Chicago → Atlanta
Timetable, Chicago time
13:14AA 9782 from Boston at the gate
18:15DL 2738 to Atlanta leaves the gate
5 h 01 apart on the timetable
The last days
AA 9782 and DL 2738 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.