UA 4051 then DL 2709 at Houston
Northwest Arkansas → Houston → Atlanta
Timetable, Houston time
10:52UA 4051 from Northwest Arkansas at the gate
08:05DL 2709 to Atlanta leaves the gate
21 h 13 apart on the timetable, overnight
DL 2709 leaves 21 h 13 after UA 4051 arrives on the timetable: more than half a day, so not a connection we count.