AA 5408 then UA 3910 at O'Hare
Knoxville → Chicago → Newark
Timetable, Chicago time
12:40AA 5408 from Knoxville at the gate
07:30UA 3910 to Newark leaves the gate
18 h 50 apart on the timetable, overnight
UA 3910 leaves 18 h 50 after AA 5408 arrives on the timetable: more than half a day, so not a connection we count.