AA 3449 then UA 5618 at O'Hare
Fargo → Chicago → Washington National
Timetable, Chicago time
15:04AA 3449 from Fargo at the gate
14:00UA 5618 to Washington National leaves the gate
22 h 56 apart on the timetable, overnight
UA 5618 leaves 22 h 56 after AA 3449 arrives on the timetable: more than half a day, so not a connection we count.