DL 5856 then DL 1084 at Detroit
Pittsburgh → Detroit → Chicago O'Hare
Timetable, Detroit time
13:28DL 5856 from Pittsburgh at the gate
17:56DL 1084 to Chicago O'Hare leaves the gate
4 h 28 apart on the timetable
The last days
DL 5856 and DL 1084 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.