UA 561 then AC 4122 at San Francisco
Kansas City → San Francisco → Ontario
Timetable, San Francisco time
20:10UA 561 from Kansas City at the gatealso NZ 9502
18:50AC 4122 to Ontario leaves the gate
22 h 40 apart on the timetable, overnight
AC 4122 leaves 22 h 40 after UA 561 arrives on the timetable: more than half a day, so not a connection we count.