DL 5064 then DL 5852 at Detroit
Buffalo → Detroit → Grand Rapids
Timetable, Detroit time
13:30DL 5064 from Buffalo at the gate
18:21DL 5852 to Grand Rapids leaves the gate
4 h 51 apart on the timetable
The last days
DL 5064 and DL 5852 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.