DL 9995 then DL 2738 at Atlanta
Toulouse → Atlanta → Chicago O'Hare
Timetable, Atlanta time
14:51DL 9995 from Toulouse at the gate
15:50DL 2738 to Chicago O'Hare leaves the gate
59 min apart on the timetable
The last days
DL 9995 and DL 2738 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.