AA 3140 then AA 987 at Miami
Jacksonville → Miami → Santo Domingo
Timetable, Miami time
08:35AA 3140 from Jacksonville at the gate
11:23AA 987 to Santo Domingo leaves the gate
2 h 48 apart on the timetable
The last days
AA 3140 and AA 987 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.