UA 2670 then DL 2709 at Houston
Dallas-Fort Worth → Houston → Atlanta
Timetable, Houston time
08:23UA 2670 from Dallas-Fort Worth at the gate
08:05DL 2709 to Atlanta leaves the gate
23 h 42 apart on the timetable, overnight
DL 2709 leaves 23 h 42 after UA 2670 arrives on the timetable: more than half a day, so not a connection we count.