LH 7488 then TP 4392 at San Francisco
Washington → San Francisco → Boston
Timetable, San Francisco time
20:35LH 7488 from Washington at the gate
10:44TP 4392 to Boston leaves the gate
14 h 09 apart on the timetable, overnight
TP 4392 leaves 14 h 09 after LH 7488 arrives on the timetable: more than half a day, so not a connection we count.