DL 5614 then B6 319 at Boston
Milwaukee → Boston → San Diego
Timetable, Boston time
17:53DL 5614 from Milwaukee at the gate
15:35B6 319 to San Diego leaves the gate
21 h 42 apart on the timetable, overnight
B6 319 leaves 21 h 42 after DL 5614 arrives on the timetable: more than half a day, so not a connection we count.