AA 640 then WN 544 at Charlotte
Denver → Charlotte → Baltimore
Timetable, Charlotte time
19:36AA 640 from Denver at the gate
17:25WN 544 to Baltimore leaves the gate
21 h 49 apart on the timetable, overnight
WN 544 leaves 21 h 49 after AA 640 arrives on the timetable: more than half a day, so not a connection we count.