WN 490 then DL 5621 at Boston
Baltimore → Boston → New York LaGuardia
Timetable, Boston time
11:10WN 490 from Baltimore at the gate
20:00DL 5621 to New York LaGuardia leaves the gate
8 h 50 apart on the timetable
The last days
WN 490 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.