AC 4121 then AF 8669 at San Francisco
Ontario → San Francisco → New York JFK
Timetable, San Francisco time
17:50AC 4121 from Ontario at the gate
14:35AF 8669 to New York JFK leaves the gate
20 h 45 apart on the timetable, overnight
AF 8669 leaves 20 h 45 after AC 4121 arrives on the timetable: more than half a day, so not a connection we count.