UA 4537 then DL 2709 at Houston
Northwest Arkansas → Houston → Atlanta
Timetable, Houston time
13:35UA 4537 from Northwest Arkansas at the gate
08:05DL 2709 to Atlanta leaves the gate
18 h 30 apart on the timetable, overnight
DL 2709 leaves 18 h 30 after UA 4537 arrives on the timetable: more than half a day, so not a connection we count.