AA 2886 then UA 5258 at O'Hare
Tampa → Chicago → Des Moines
Timetable, Chicago time
09:00AA 2886 from Tampa at the gate
21:25UA 5258 to Des Moines leaves the gate
12 h 25 apart on the timetable
UA 5258 leaves 12 h 25 after AA 2886 arrives on the timetable: more than half a day, so not a connection we count.