DL 9728 then DL 1431 at Salt Lake City
Los Angeles → Salt Lake City → Phoenix Sky Harbor
Timetable, Salt Lake City time
12:25DL 9728 from Los Angeles at the gate
11:29DL 1431 to Phoenix Sky Harbor leaves the gate
23 h 04 apart on the timetable, overnight
DL 1431 leaves 23 h 04 after DL 9728 arrives on the timetable: more than half a day, so not a connection we count.