UA 246 then AS 2486 at San Francisco
Chicago O'Hare → San Francisco → Los Angeles
Timetable, San Francisco time
08:44UA 246 from Chicago O'Hare at the gatealso AC 5029, VA 8094, NZ 9323
06:00AS 2486 to Los Angeles leaves the gate
21 h 16 apart on the timetable, overnight
AS 2486 leaves 21 h 16 after UA 246 arrives on the timetable: more than half a day, so not a connection we count.