UA 1909 then TP 4392 at San Francisco
San Luis Obispo → San Francisco → Boston
Timetable, San Francisco time
09:06UA 1909 from San Luis Obispo at the gatealso LH 8577
22:10TP 4392 to Boston leaves the gate
13 h 04 apart on the timetable
TP 4392 leaves 13 h 04 after UA 1909 arrives on the timetable: more than half a day, so not a connection we count.