DL 763 then DL 3776 at LAX
Atlanta → Los Angeles → Tucson
Timetable, Los Angeles time
19:55DL 763 from Atlanta at the gate
14:32DL 3776 to Tucson leaves the gate
18 h 37 apart on the timetable, overnight
DL 3776 leaves 18 h 37 after DL 763 arrives on the timetable: more than half a day, so not a connection we count.