DL 9728 then DL 2743 at Salt Lake City
Los Angeles → Salt Lake City → Ontario
Timetable, Salt Lake City time
12:25DL 9728 from Los Angeles at the gate
11:44DL 2743 to Ontario leaves the gate
23 h 19 apart on the timetable, overnight
DL 2743 leaves 23 h 19 after DL 9728 arrives on the timetable: more than half a day, so not a connection we count.