AA 9909 then UA 2633 at Denver
Los Angeles → Denver → San Francisco
Timetable, Denver time
16:45AA 9909 from Los Angeles at the gate
15:37UA 2633 to San Francisco leaves the gate
22 h 52 apart on the timetable, overnight
UA 2633 leaves 22 h 52 after AA 9909 arrives on the timetable: more than half a day, so not a connection we count.