AA 1637 then WN 544 at Charlotte
Washington → Charlotte → Baltimore
Timetable, Charlotte time
07:38AA 1637 from Washington at the gate
20:05WN 544 to Baltimore leaves the gate
12 h 27 apart on the timetable
WN 544 leaves 12 h 27 after AA 1637 arrives on the timetable: more than half a day, so not a connection we count.