DL 2709 then DL 1986 at Houston
Atlanta → Houston → New York LaGuardia
Timetable, Houston time
13:23DL 2709 from Atlanta at the gate
14:15DL 1986 to New York LaGuardia leaves the gate
52 min apart on the timetable
The last days
DL 2709 and DL 1986 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.