DL 8784 then UA 4329 at Detroit
Atlanta → Detroit → Washington
Timetable, Detroit time
08:27DL 8784 from Atlanta at the gate
14:45UA 4329 to Washington leaves the gate
6 h 18 apart on the timetable
The last days
DL 8784 and UA 4329 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.