WN 4960 then DL 1187 at Detroit
St Louis → Detroit → Boston
Timetable, Detroit time
22:25WN 4960 from St Louis at the gate
21:58DL 1187 to Boston leaves the gate
23 h 33 apart on the timetable, overnight
DL 1187 leaves 23 h 33 after WN 4960 arrives on the timetable: more than half a day, so not a connection we count.