AA 9911 then UA 2836 at O'Hare
Des Moines → Chicago → Tampa
Timetable, Chicago time
19:30AA 9911 from Des Moines at the gate
17:45UA 2836 to Tampa leaves the gate
22 h 15 apart on the timetable, overnight
UA 2836 leaves 22 h 15 after AA 9911 arrives on the timetable: more than half a day, so not a connection we count.