AA 478 then DL 8800 at Miami
New York LaGuardia → Miami → Boston
Timetable, Miami time
11:41AA 478 from New York LaGuardia at the gate
15:40DL 8800 to Boston leaves the gate
3 h 59 apart on the timetable
The last days
AA 478 and DL 8800 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.