AC 4375 then UA 552 at San Francisco
Chicago O'Hare → San Francisco → Redmond
Timetable, San Francisco time
19:28AC 4375 from Chicago O'Hare at the gatealso NZ 9330
16:40UA 552 to Redmond leaves the gate
21 h 12 apart on the timetable, overnight
UA 552 leaves 21 h 12 after AC 4375 arrives on the timetable: more than half a day, so not a connection we count.