DL 3879 then DL 2036 at Detroit
Cleveland → Detroit → Atlanta
Timetable, Detroit time
11:23DL 3879 from Cleveland at the gate
18:46DL 2036 to Atlanta leaves the gate
7 h 23 apart on the timetable
The last days
DL 3879 and DL 2036 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.