B6 2120 then AA 1148 at Boston
San Diego → Boston → Dallas-Fort Worth
Timetable, Boston time
05:34B6 2120 from San Diego at the gate
17:58AA 1148 to Dallas-Fort Worth leaves the gate
12 h 24 apart on the timetable
AA 1148 leaves 12 h 24 after B6 2120 arrives on the timetable: more than half a day, so not a connection we count.