UA 462 then DL 2709 at Houston
Portland (Oregon) → Houston → Atlanta
Timetable, Houston time
13:07UA 462 from Portland (Oregon) at the gate
08:05DL 2709 to Atlanta leaves the gate
18 h 58 apart on the timetable, overnight
DL 2709 leaves 18 h 58 after UA 462 arrives on the timetable: more than half a day, so not a connection we count.