WN 2974 then TP 4392 at San Francisco
Las Vegas → San Francisco → Boston
Timetable, San Francisco time
22:00WN 2974 from Las Vegas at the gate
10:44TP 4392 to Boston leaves the gate
12 h 44 apart on the timetable, overnight
TP 4392 leaves 12 h 44 after WN 2974 arrives on the timetable: more than half a day, so not a connection we count.