UA 2833 then DL 2709 at Houston
Chicago → Houston → Atlanta
Timetable, Houston time
09:50UA 2833 from Chicago at the gate
08:05DL 2709 to Atlanta leaves the gate
22 h 15 apart on the timetable, overnight
DL 2709 leaves 22 h 15 after UA 2833 arrives on the timetable: more than half a day, so not a connection we count.