F9 2930 then DL 2057 at DFW
San Francisco → Dallas-Fort Worth → Boston
Timetable, Dallas-Fort Worth time
05:25F9 2930 from San Francisco at the gate
17:30DL 2057 to Boston leaves the gate
12 h 05 apart on the timetable
DL 2057 leaves 12 h 05 after F9 2930 arrives on the timetable: more than half a day, so not a connection we count.