WN 4960 then DL 4173 at Detroit
St Louis → Detroit → Saginaw
Timetable, Detroit time
22:25WN 4960 from St Louis at the gate
21:15DL 4173 to Saginaw leaves the gate
22 h 50 apart on the timetable, overnight
DL 4173 leaves 22 h 50 after WN 4960 arrives on the timetable: more than half a day, so not a connection we count.