AA 4478 then WN 2138 at Atlanta
New York LaGuardia → Atlanta → Baltimore
Timetable, Atlanta time
12:05AA 4478 from New York LaGuardia at the gate
12:00WN 2138 to Baltimore leaves the gate
23 h 55 apart on the timetable, overnight
WN 2138 leaves 23 h 55 after AA 4478 arrives on the timetable: more than half a day, so not a connection we count.