UA 2812 then TP 4392 at San Francisco
Medford → San Francisco → Boston
Timetable, San Francisco time
07:29UA 2812 from Medford at the gate
22:10TP 4392 to Boston leaves the gate
14 h 41 apart on the timetable
TP 4392 leaves 14 h 41 after UA 2812 arrives on the timetable: more than half a day, so not a connection we count.