AA 9780 then UA 2489 at Miami
Amarillo → Miami → Newark
Timetable, Miami time
12:40AA 9780 from Amarillo at the gate
13:53UA 2489 to Newark leaves the gate
1 h 13 apart on the timetable
The last days
AA 9780 and UA 2489 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.