AA 2886 then UA 1555 at O'Hare
Tampa → Chicago → Oklahoma City
Timetable, Chicago time
09:00AA 2886 from Tampa at the gate
21:25UA 1555 to Oklahoma City leaves the gate
12 h 25 apart on the timetable
UA 1555 leaves 12 h 25 after AA 2886 arrives on the timetable: more than half a day, so not a connection we count.