AC 4121 then UA 1267 at San Francisco
Ontario → San Francisco → Detroit
Timetable, San Francisco time
10:55AC 4121 from Ontario at the gate
23:00UA 1267 to Detroit leaves the gate
12 h 05 apart on the timetable
UA 1267 leaves 12 h 05 after AC 4121 arrives on the timetable: more than half a day, so not a connection we count.