UA 281 then DL 2709 at Houston
Oklahoma City → Houston → Atlanta
Timetable, Houston time
08:14UA 281 from Oklahoma City at the gate
08:05DL 2709 to Atlanta leaves the gate
23 h 51 apart on the timetable, overnight
DL 2709 leaves 23 h 51 after UA 281 arrives on the timetable: more than half a day, so not a connection we count.