UA 705 then TP 4392 at San Francisco
Puerto Vallarta → San Francisco → Boston
Timetable, San Francisco time
19:24UA 705 from Puerto Vallarta at the gatealso AC 4144
10:44TP 4392 to Boston leaves the gate
15 h 20 apart on the timetable, overnight
TP 4392 leaves 15 h 20 after UA 705 arrives on the timetable: more than half a day, so not a connection we count.