AA 2407 then UA 1885 at San Francisco
Philadelphia → San Francisco → Detroit
Timetable, San Francisco time
11:35AA 2407 from Philadelphia at the gate
08:26UA 1885 to Detroit leaves the gate
20 h 51 apart on the timetable, overnight
UA 1885 leaves 20 h 51 after AA 2407 arrives on the timetable: more than half a day, so not a connection we count.