DL 1874 then UA 1067 at Houston
Atlanta → Houston → Chicago
Timetable, Houston time
15:47DL 1874 from Atlanta at the gate
15:40UA 1067 to Chicago leaves the gate
23 h 53 apart on the timetable, overnight
UA 1067 leaves 23 h 53 after DL 1874 arrives on the timetable: more than half a day, so not a connection we count.