AC 4121 then AF 2414 at San Francisco
Ontario → San Francisco → Salt Lake City
Timetable, San Francisco time
17:50AC 4121 from Ontario at the gate
17:13AF 2414 to Salt Lake City leaves the gate
23 h 23 apart on the timetable, overnight
AF 2414 leaves 23 h 23 after AC 4121 arrives on the timetable: more than half a day, so not a connection we count.