BA 7607 then UA 1971 at San Francisco
Los Angeles → San Francisco → Chicago O'Hare
Timetable, San Francisco time
23:27BA 7607 from Los Angeles at the gate
22:45UA 1971 to Chicago O'Hare leaves the gatealso AC 4200
23 h 18 apart on the timetable, overnight
UA 1971 leaves 23 h 18 after BA 7607 arrives on the timetable: more than half a day, so not a connection we count.