DL 1798 then DL 1655 at Boston
Kansas City → Boston → San Francisco
Timetable, Boston time
17:05DL 1798 from Kansas City at the gate
16:50DL 1655 to San Francisco leaves the gate
23 h 45 apart on the timetable, overnight
DL 1655 leaves 23 h 45 after DL 1798 arrives on the timetable: more than half a day, so not a connection we count.