AA 5456 then CI 5345 at Atlanta
Philadelphia → Atlanta → San Francisco
Timetable, Atlanta time
13:00AA 5456 from Philadelphia at the gate
01:58CI 5345 to San Francisco leaves the gate
12 h 58 apart on the timetable, overnight
CI 5345 leaves 12 h 58 after AA 5456 arrives on the timetable: more than half a day, so not a connection we count.