UA 3911 then AA 2541 at O'Hare
Portland (Oregon) → Chicago → Newark
Timetable, Chicago time
17:09UA 3911 from Portland (Oregon) at the gate
10:10AA 2541 to Newark leaves the gate
17 h 01 apart on the timetable, overnight
AA 2541 leaves 17 h 01 after UA 3911 arrives on the timetable: more than half a day, so not a connection we count.