UA 822 then TP 4392 at San Francisco
Mexico City → San Francisco → Boston
Timetable, San Francisco time
08:44UA 822 from Mexico City at the gatealso AC 5403, NH 7369, NZ 9822
22:10TP 4392 to Boston leaves the gate
13 h 26 apart on the timetable
TP 4392 leaves 13 h 26 after UA 822 arrives on the timetable: more than half a day, so not a connection we count.