AA 9909 then DL 957 at Denver
Los Angeles → Denver → Atlanta
Timetable, Denver time
16:45AA 9909 from Los Angeles at the gate
14:36DL 957 to Atlanta leaves the gate
21 h 51 apart on the timetable, overnight
DL 957 leaves 21 h 51 after AA 9909 arrives on the timetable: more than half a day, so not a connection we count.