DL 5238 then DL 1187 at Detroit
Greenville-Spartanburg → Detroit → Boston
Timetable, Detroit time
09:12DL 5238 from Greenville-Spartanburg at the gate
21:58DL 1187 to Boston leaves the gate
12 h 46 apart on the timetable
DL 1187 leaves 12 h 46 after DL 5238 arrives on the timetable: more than half a day, so not a connection we count.