AA 2757 then AA 2305 at San Francisco
Miami → San Francisco → Dallas-Fort Worth
Timetable, San Francisco time
00:12AA 2757 from Miami at the gatealso QF 4513, G3 6441
06:47AA 2305 to Dallas-Fort Worth leaves the gatealso QF 4719, IB 4985
6 h 35 apart on the timetable
The last days
AA 2757 and AA 2305 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.