AA 706 then UA 4645 at O'Hare
Washington National → Chicago → Fort Wayne
Timetable, Chicago time
16:18AA 706 from Washington National at the gate
11:25UA 4645 to Fort Wayne leaves the gate
19 h 07 apart on the timetable, overnight
UA 4645 leaves 19 h 07 after AA 706 arrives on the timetable: more than half a day, so not a connection we count.