F9 4567 then AA 6281 at Denver
St Louis → Denver → Los Angeles
Timetable, Denver time
21:30F9 4567 from St Louis at the gate
18:46AA 6281 to Los Angeles leaves the gate
21 h 16 apart on the timetable, overnight
AA 6281 leaves 21 h 16 after F9 4567 arrives on the timetable: more than half a day, so not a connection we count.