UA 4000 then DL 2709 at Houston
Birmingham (Alabama) → Houston → Atlanta
Timetable, Houston time
11:10UA 4000 from Birmingham (Alabama) at the gate
08:05DL 2709 to Atlanta leaves the gate
20 h 55 apart on the timetable, overnight
DL 2709 leaves 20 h 55 after UA 4000 arrives on the timetable: more than half a day, so not a connection we count.