DL 539 then DL 1892 at Atlanta
Portland (Oregon) → Atlanta → Chattanooga
Timetable, Atlanta time
19:27DL 539 from Portland (Oregon) at the gate
14:30DL 1892 to Chattanooga leaves the gate
19 h 03 apart on the timetable, overnight
DL 1892 leaves 19 h 03 after DL 539 arrives on the timetable: more than half a day, so not a connection we count.