AA 3807 then WN 1957 at Boston
Cincinnati → Boston → Baltimore
Timetable, Boston time
10:48AA 3807 from Cincinnati at the gate
19:45WN 1957 to Baltimore leaves the gate
8 h 57 apart on the timetable
The last days
AA 3807 and WN 1957 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.