AA 3046 then UA 3911 at O'Hare
Seattle (SEA) → Chicago → Newark
Timetable, Chicago time
23:45AA 3046 from Seattle (SEA) at the gate
12:00UA 3911 to Newark leaves the gate
12 h 15 apart on the timetable, overnight
UA 3911 leaves 12 h 15 after AA 3046 arrives on the timetable: more than half a day, so not a connection we count.