UA 2754 then SQ 1550 at San Francisco
Minneapolis → San Francisco → Boston
Timetable, San Francisco time
19:33UA 2754 from Minneapolis at the gatealso OZ 6312, VA 8253, NZ 9438
10:44SQ 1550 to Boston leaves the gate
15 h 11 apart on the timetable, overnight
SQ 1550 leaves 15 h 11 after UA 2754 arrives on the timetable: more than half a day, so not a connection we count.