UA 3922 then AA 873 at O'Hare
Tampa → Chicago → Atlanta
Timetable, Chicago time
11:35UA 3922 from Tampa at the gate
07:17AA 873 to Atlanta leaves the gate
19 h 42 apart on the timetable, overnight
AA 873 leaves 19 h 42 after UA 3922 arrives on the timetable: more than half a day, so not a connection we count.