UA 3911 then AA 4583 at O'Hare
Portland (Oregon) → Chicago → Raleigh-Durham
Timetable, Chicago time
17:09UA 3911 from Portland (Oregon) at the gate
09:56AA 4583 to Raleigh-Durham leaves the gate
16 h 47 apart on the timetable, overnight
AA 4583 leaves 16 h 47 after UA 3911 arrives on the timetable: more than half a day, so not a connection we count.