AA 2357 then DL 1986 at Houston
Phoenix → Houston → New York LaGuardia
Timetable, Houston time
13:31AA 2357 from Phoenix at the gate
14:15DL 1986 to New York LaGuardia leaves the gate
44 min apart on the timetable
The last days
AA 2357 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.