UA 1341 then UA 3924 at San Francisco
Detroit → San Francisco → Los Angeles
Timetable, San Francisco time
19:31UA 1341 from Detroit at the gatealso OZ 9538
14:30UA 3924 to Los Angeles leaves the gate
18 h 59 apart on the timetable, overnight
UA 3924 leaves 18 h 59 after UA 1341 arrives on the timetable: more than half a day, so not a connection we count.