AA 3585 then DL 5621 at Boston
Louisville → Boston → New York LaGuardia
Timetable, Boston time
16:55AA 3585 from Louisville at the gate
20:00DL 5621 to New York LaGuardia leaves the gate
3 h 05 apart on the timetable
The last days
AA 3585 and DL 5621 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.