CZ 1646 then UA 1147 at San Francisco
Charlotte → San Francisco → Chicago O'Hare
Timetable, San Francisco time
16:51CZ 1646 from Charlotte at the gatealso AA 2569, QF 4507
15:20UA 1147 to Chicago O'Hare leaves the gatealso AC 4185, CA 7326, VA 8104, NZ 9313
22 h 29 apart on the timetable, overnight
UA 1147 leaves 22 h 29 after CZ 1646 arrives on the timetable: more than half a day, so not a connection we count.