AA 3247 then WN 791 at Boston
Miami → Boston → Nashville
Timetable, Boston time
13:23AA 3247 from Miami at the gate
17:45WN 791 to Nashville leaves the gate
4 h 22 apart on the timetable
The last days
AA 3247 and WN 791 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.