WN 3500 then DL 5238 at Detroit
St Louis → Detroit → Grand Rapids
Timetable, Detroit time
12:30WN 3500 from St Louis at the gate
16:00DL 5238 to Grand Rapids leaves the gate
3 h 30 apart on the timetable
The last days
WN 3500 and DL 5238 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.