DL 5278 then DL 2567 at Detroit
Des Moines → Detroit → Newark
Timetable, Detroit time
15:10DL 5278 from Des Moines at the gate
17:40DL 2567 to Newark leaves the gate
2 h 30 apart on the timetable
The last days
DL 5278 and DL 2567 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.