WN 4960 then DL 5448 at Detroit
St Louis → Detroit → Richmond
Timetable, Detroit time
22:25WN 4960 from St Louis at the gate
21:50DL 5448 to Richmond leaves the gate
23 h 25 apart on the timetable, overnight
DL 5448 leaves 23 h 25 after WN 4960 arrives on the timetable: more than half a day, so not a connection we count.