AC 4121 then UA 582 at San Francisco
Ontario → San Francisco → Boise
Timetable, San Francisco time
17:50AC 4121 from Ontario at the gate
14:02UA 582 to Boise leaves the gatealso AC 3996
20 h 12 apart on the timetable, overnight
UA 582 leaves 20 h 12 after AC 4121 arrives on the timetable: more than half a day, so not a connection we count.