DL 920 then UA 4720 at Salt Lake City
San Francisco → Salt Lake City → Denver
Timetable, Salt Lake City time
14:13DL 920 from San Francisco at the gate
13:04UA 4720 to Denver leaves the gate
22 h 51 apart on the timetable, overnight
UA 4720 leaves 22 h 51 after DL 920 arrives on the timetable: more than half a day, so not a connection we count.