UA 2786 then TP 4392 at San Francisco
Washington → San Francisco → Boston
Timetable, San Francisco time
21:29UA 2786 from Washington at the gatealso OZ 6316
10:44TP 4392 to Boston leaves the gate
13 h 15 apart on the timetable, overnight
TP 4392 leaves 13 h 15 after UA 2786 arrives on the timetable: more than half a day, so not a connection we count.