UA 1577 then UA 552 at San Francisco
Chicago O'Hare → San Francisco → Redmond
Timetable, San Francisco time
17:23UA 1577 from Chicago O'Hare at the gatealso AC 5081, VA 8095, NZ 9326
16:20UA 552 to Redmond leaves the gate
22 h 57 apart on the timetable, overnight
UA 552 leaves 22 h 57 after UA 1577 arrives on the timetable: more than half a day, so not a connection we count.