AC 4533 then UA 1914 at San Francisco
Sacramento → San Francisco → Chicago O'Hare
Timetable, San Francisco time
20:00AC 4533 from Sacramento at the gate
17:10UA 1914 to Chicago O'Hare leaves the gatealso AC 4196, NZ 9314
21 h 10 apart on the timetable, overnight
UA 1914 leaves 21 h 10 after AC 4533 arrives on the timetable: more than half a day, so not a connection we count.