WN 4960 then DL 3949 at Detroit
St Louis → Detroit → Elmira
Timetable, Detroit time
22:25WN 4960 from St Louis at the gate
21:56DL 3949 to Elmira leaves the gate
23 h 31 apart on the timetable, overnight
DL 3949 leaves 23 h 31 after WN 4960 arrives on the timetable: more than half a day, so not a connection we count.