DL 810 then SY 8187 at Detroit
Seattle → Detroit → Cleveland
Timetable, Detroit time
06:28DL 810 from Seattle at the gate
10:34SY 8187 to Cleveland leaves the gate
4 h 06 apart on the timetable
The last days
DL 810 and SY 8187 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.