AA 1258 then AA 322 at Miami
Guatemala City → Miami → Newark
Timetable, Miami time
19:00AA 1258 from Guatemala City at the gate
19:49AA 322 to Newark leaves the gate
49 min apart on the timetable
The last days
AA 1258 and AA 322 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.