DL 3884 then DL 8925 at Detroit
Cleveland → Detroit → Washington
Timetable, Detroit time
07:09DL 3884 from Cleveland at the gate
14:00DL 8925 to Washington leaves the gate
6 h 51 apart on the timetable
The last days
DL 3884 and DL 8925 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.