UA 3908 then AA 1021 at O'Hare
Orlando → Chicago → Los Angeles
Timetable, Chicago time
21:38UA 3908 from Orlando at the gate
13:24AA 1021 to Los Angeles leaves the gate
15 h 46 apart on the timetable, overnight
AA 1021 leaves 15 h 46 after UA 3908 arrives on the timetable: more than half a day, so not a connection we count.