AA 2154 then UA 5673 at O'Hare
Charleston (South Carolina) → Chicago → Oklahoma City
Timetable, Chicago time
09:00AA 2154 from Charleston (South Carolina) at the gate
08:50UA 5673 to Oklahoma City leaves the gate
23 h 50 apart on the timetable, overnight
UA 5673 leaves 23 h 50 after AA 2154 arrives on the timetable: more than half a day, so not a connection we count.