AA 2886 then UA 4461 at O'Hare
Tampa → Chicago → Birmingham (Alabama)
Timetable, Chicago time
09:00AA 2886 from Tampa at the gate
21:30UA 4461 to Birmingham (Alabama) leaves the gate
12 h 30 apart on the timetable
UA 4461 leaves 12 h 30 after AA 2886 arrives on the timetable: more than half a day, so not a connection we count.