AA 125 then UA 5618 at O'Hare
Madrid → Chicago → Washington National
Timetable, Chicago time
15:05AA 125 from Madrid at the gate
14:00UA 5618 to Washington National leaves the gate
22 h 55 apart on the timetable, overnight
UA 5618 leaves 22 h 55 after AA 125 arrives on the timetable: more than half a day, so not a connection we count.