AA 2203 then DL 560 at Seattle
Philadelphia → Seattle → Atlanta
Timetable, Seattle time
11:34AA 2203 from Philadelphia at the gate
23:35DL 560 to Atlanta leaves the gate
12 h 01 apart on the timetable
DL 560 leaves 12 h 01 after AA 2203 arrives on the timetable: more than half a day, so not a connection we count.