CZ 1646 then UA 2279 at San Francisco
Charlotte → San Francisco → Seattle
Timetable, San Francisco time
17:33CZ 1646 from Charlotte at the gatealso AA 2569
16:17UA 2279 to Seattle leaves the gatealso AZ 4506, OZ 6401, VA 8282, NZ 9406
22 h 44 apart on the timetable, overnight
UA 2279 leaves 22 h 44 after CZ 1646 arrives on the timetable: more than half a day, so not a connection we count.