DL 1091 then UA 1389 at San Francisco
Salt Lake City → San Francisco → San Diego
Timetable, San Francisco time
23:59DL 1091 from Salt Lake City at the gatealso VS 4542
22:42UA 1389 to San Diego leaves the gatealso CM 2511, AC 4292, VA 8426, LH 9372, NZ 9584
22 h 43 apart on the timetable, overnight
UA 1389 leaves 22 h 43 after DL 1091 arrives on the timetable: more than half a day, so not a connection we count.