AA 9909 then UA 5133 at Denver
Los Angeles → Denver → Butte
Timetable, Denver time
16:45AA 9909 from Los Angeles at the gate
16:30UA 5133 to Butte leaves the gate
23 h 45 apart on the timetable, overnight
UA 5133 leaves 23 h 45 after AA 9909 arrives on the timetable: more than half a day, so not a connection we count.