AC 4052 then UA 8219 at San Francisco
Reno → San Francisco → Chicago O'Hare
Timetable, San Francisco time
20:06AC 4052 from Reno at the gatealso OZ 6346, LH 8901
18:10UA 8219 to Chicago O'Hare leaves the gate
22 h 04 apart on the timetable, overnight
UA 8219 leaves 22 h 04 after AC 4052 arrives on the timetable: more than half a day, so not a connection we count.