AA 9909 then WN 878 at Denver
Los Angeles → Denver → Cincinnati
Timetable, Denver time
16:45AA 9909 from Los Angeles at the gate
14:25WN 878 to Cincinnati leaves the gate
21 h 40 apart on the timetable, overnight
WN 878 leaves 21 h 40 after AA 9909 arrives on the timetable: more than half a day, so not a connection we count.