DL 2398 then AA 4361 at JFK
Atlanta → New York → Washington National
Timetable, New York time
17:36DL 2398 from Atlanta at the gate
06:40AA 4361 to Washington National leaves the gate
13 h 04 apart on the timetable, overnight
AA 4361 leaves 13 h 04 after DL 2398 arrives on the timetable: more than half a day, so not a connection we count.