AA 5456 then WN 2138 at Atlanta
Philadelphia → Atlanta → Baltimore
Timetable, Atlanta time
13:00AA 5456 from Philadelphia at the gate
12:00WN 2138 to Baltimore leaves the gate
23 h apart on the timetable, overnight
WN 2138 leaves 23 h after AA 5456 arrives on the timetable: more than half a day, so not a connection we count.