UA 367 then B6 134 at San Francisco
Washington → San Francisco → Boston
Timetable, San Francisco time
01:29UA 367 from Washington at the gatealso LH 7530, VA 8388, NZ 9181
22:10B6 134 to Boston leaves the gatealso SQ 1544, EY 8386
20 h 41 apart on the timetable
B6 134 leaves 20 h 41 after UA 367 arrives on the timetable: more than half a day, so not a connection we count.