UA 3852 then BA 5610 at San Francisco
Ontario → San Francisco → Chicago O'Hare
Timetable, San Francisco time
14:00UA 3852 from Ontario at the gate
07:13BA 5610 to Chicago O'Hare leaves the gatealso RJ 7152
17 h 13 apart on the timetable, overnight
BA 5610 leaves 17 h 13 after UA 3852 arrives on the timetable: more than half a day, so not a connection we count.