UA 1508 then TP 4392 at San Francisco
Burbank → San Francisco → Boston
Timetable, San Francisco time
20:08UA 1508 from Burbank at the gatealso AC 3569
10:44TP 4392 to Boston leaves the gate
14 h 36 apart on the timetable, overnight
TP 4392 leaves 14 h 36 after UA 1508 arrives on the timetable: more than half a day, so not a connection we count.