DL 2554 then DL 4928 at Atlanta
Hartford → Atlanta → Huntsville
Timetable, Atlanta time
09:36DL 2554 from Hartford at the gate
16:31DL 4928 to Huntsville leaves the gate
6 h 55 apart on the timetable
The last days
DL 2554 and DL 4928 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.