DL 571 then DL 2305 at Boston
San Diego → Boston → Dallas-Fort Worth
Timetable, Boston time
06:40DL 571 from San Diego at the gate
19:30DL 2305 to Dallas-Fort Worth leaves the gate
12 h 50 apart on the timetable
DL 2305 leaves 12 h 50 after DL 571 arrives on the timetable: more than half a day, so not a connection we count.