UA 3922 then AA 2124 at O'Hare
Tampa → Chicago → Los Angeles
Timetable, Chicago time
11:35UA 3922 from Tampa at the gate
08:00AA 2124 to Los Angeles leaves the gate
20 h 25 apart on the timetable, overnight
AA 2124 leaves 20 h 25 after UA 3922 arrives on the timetable: more than half a day, so not a connection we count.