UA 573 then TP 4392 at San Francisco
Burbank → San Francisco → Boston
Timetable, San Francisco time
17:50UA 573 from Burbank at the gate
06:00TP 4392 to Boston leaves the gatealso EY 8006
12 h 10 apart on the timetable, overnight
TP 4392 leaves 12 h 10 after UA 573 arrives on the timetable: more than half a day, so not a connection we count.