DL 1697 then DL 1655 at Boston
Phoenix → Boston → San Francisco
Timetable, Boston time
21:00DL 1697 from Phoenix at the gate
16:50DL 1655 to San Francisco leaves the gate
19 h 50 apart on the timetable, overnight
DL 1655 leaves 19 h 50 after DL 1697 arrives on the timetable: more than half a day, so not a connection we count.