DL 5238 then DL 4297 at Detroit
Greenville-Spartanburg → Detroit → Marquette
Timetable, Detroit time
09:12DL 5238 from Greenville-Spartanburg at the gate
21:40DL 4297 to Marquette leaves the gate
12 h 28 apart on the timetable
DL 4297 leaves 12 h 28 after DL 5238 arrives on the timetable: more than half a day, so not a connection we count.