DL 539 then DL 5258 at Atlanta
Portland (Oregon) → Atlanta → Knoxville
Timetable, Atlanta time
19:27DL 539 from Portland (Oregon) at the gate
17:45DL 5258 to Knoxville leaves the gate
22 h 18 apart on the timetable, overnight
DL 5258 leaves 22 h 18 after DL 539 arrives on the timetable: more than half a day, so not a connection we count.