AV 4509 then UA 581 at San Francisco
Taipei → San Francisco → Cleveland
Timetable, San Francisco time
15:00AV 4509 from Taipei at the gate
12:45UA 581 to Cleveland leaves the gate
21 h 45 apart on the timetable, overnight
UA 581 leaves 21 h 45 after AV 4509 arrives on the timetable: more than half a day, so not a connection we count.