UA 1689 then DL 3704 at LAX
Washington → Los Angeles → Aspen
Timetable, Los Angeles time
15:34UA 1689 from Washington at the gate
10:35DL 3704 to Aspen leaves the gate
19 h 01 apart on the timetable, overnight
DL 3704 leaves 19 h 01 after UA 1689 arrives on the timetable: more than half a day, so not a connection we count.