AA 9977 then WN 1424 at Philadelphia
Cleveland → Philadelphia → St Louis
Timetable, Philadelphia time
23:17AA 9977 from Cleveland at the gate
14:45WN 1424 to St Louis leaves the gate
15 h 28 apart on the timetable, overnight
WN 1424 leaves 15 h 28 after AA 9977 arrives on the timetable: more than half a day, so not a connection we count.