AF 2251 then AC 4122 at San Francisco
Seattle → San Francisco → Ontario
Timetable, San Francisco time
20:18AF 2251 from Seattle at the gatealso WS 8631
18:50AC 4122 to Ontario leaves the gate
22 h 32 apart on the timetable, overnight
AC 4122 leaves 22 h 32 after AF 2251 arrives on the timetable: more than half a day, so not a connection we count.