UA 1982 then DL 2709 at Houston
Chicago → Houston → Atlanta
Timetable, Houston time
08:26UA 1982 from Chicago at the gate
08:05DL 2709 to Atlanta leaves the gate
23 h 39 apart on the timetable, overnight
DL 2709 leaves 23 h 39 after UA 1982 arrives on the timetable: more than half a day, so not a connection we count.