AA 9909 then UA 2040 at Denver
Los Angeles → Denver → Raleigh-Durham
Timetable, Denver time
16:45AA 9909 from Los Angeles at the gate
16:18UA 2040 to Raleigh-Durham leaves the gate
23 h 33 apart on the timetable, overnight
UA 2040 leaves 23 h 33 after AA 9909 arrives on the timetable: more than half a day, so not a connection we count.