DL 2419 then DL 514 at Phoenix
Seattle → Phoenix → Boston
Timetable, Phoenix time
11:19DL 2419 from Seattle at the gate
23:23DL 514 to Boston leaves the gate
12 h 04 apart on the timetable
DL 514 leaves 12 h 04 after DL 2419 arrives on the timetable: more than half a day, so not a connection we count.