DL 1817 then DL 1753 at Atlanta
Knoxville → Atlanta → Memphis
Timetable, Atlanta time
11:32DL 1817 from Knoxville at the gate
16:37DL 1753 to Memphis leaves the gate
5 h 05 apart on the timetable
The last days
DL 1817 and DL 1753 weren’t both flown 15 min to 12 h apart in the last 21 days.
Statistics from past flights, not live flight information. Always check times and your connection with your airline, and don’t base travel or booking decisions on these numbers.