WN 1801 then AA 5503 at Atlanta
Denver → Atlanta → Washington National
Timetable, Atlanta time
18:35WN 1801 from Denver at the gate
16:55AA 5503 to Washington National leaves the gate
22 h 20 apart on the timetable, overnight
AA 5503 leaves 22 h 20 after WN 1801 arrives on the timetable: more than half a day, so not a connection we count.