B6 733 then UA 1885 at San Francisco
Boston → San Francisco → Detroit
Timetable, San Francisco time
19:35B6 733 from Boston at the gatealso EY 8330
08:26UA 1885 to Detroit leaves the gate
12 h 51 apart on the timetable, overnight
UA 1885 leaves 12 h 51 after B6 733 arrives on the timetable: more than half a day, so not a connection we count.