UA 660 then DL 3704 at LAX
San Diego → Los Angeles → Aspen
Timetable, Los Angeles time
15:35UA 660 from San Diego at the gate
10:35DL 3704 to Aspen leaves the gate
19 h apart on the timetable, overnight
DL 3704 leaves 19 h after UA 660 arrives on the timetable: more than half a day, so not a connection we count.