AA 2378 then DL 2217 at Miami
New York LaGuardia → Miami → Boston
Timetable, Miami time
14:10AA 2378 from New York LaGuardia at the gate
20:32DL 2217 to Boston leaves the gate
6 h 22 apart on the timetable
The last days
AA 2378 and DL 2217 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.