DL 4237 then UA 5970 at Salt Lake City
St George → Salt Lake City → San Francisco
Timetable, Salt Lake City time
10:10DL 4237 from St George at the gate
08:57UA 5970 to San Francisco leaves the gate
22 h 47 apart on the timetable, overnight
UA 5970 leaves 22 h 47 after DL 4237 arrives on the timetable: more than half a day, so not a connection we count.