DL 1091 then UA 1 at San Francisco
Salt Lake City → San Francisco → Singapore
Timetable, San Francisco time
23:59DL 1091 from Salt Lake City at the gatealso VS 4542
22:40UA 1 to Singapore leaves the gate
22 h 41 apart on the timetable, overnight
UA 1 leaves 22 h 41 after DL 1091 arrives on the timetable: more than half a day, so not a connection we count.