AA 9909 then UA 1208 at Denver
Los Angeles → Denver → Sacramento
Timetable, Denver time
16:45AA 9909 from Los Angeles at the gate
15:58UA 1208 to Sacramento leaves the gate
23 h 13 apart on the timetable, overnight
UA 1208 leaves 23 h 13 after AA 9909 arrives on the timetable: more than half a day, so not a connection we count.