AA 457 then UA 4645 at O'Hare
Washington National → Chicago → Fort Wayne
Timetable, Chicago time
14:15AA 457 from Washington National at the gate
11:25UA 4645 to Fort Wayne leaves the gate
21 h 10 apart on the timetable, overnight
UA 4645 leaves 21 h 10 after AA 457 arrives on the timetable: more than half a day, so not a connection we count.