UA 2492 then UA 2278 at San Francisco
Los Angeles → San Francisco → Chicago O'Hare
Timetable, San Francisco time
07:30UA 2492 from Los Angeles at the gatealso NH 7357, VA 8059
22:45UA 2278 to Chicago O'Hare leaves the gate
15 h 15 apart on the timetable
UA 2278 leaves 15 h 15 after UA 2492 arrives on the timetable: more than half a day, so not a connection we count.