DL 860 then UA 3906 at San Francisco
Boston → San Francisco → Newark
Timetable, San Francisco time
13:51DL 860 from Boston at the gatealso LY 4227, WS 7646
07:00UA 3906 to Newark leaves the gate
17 h 09 apart on the timetable, overnight
UA 3906 leaves 17 h 09 after DL 860 arrives on the timetable: more than half a day, so not a connection we count.