WN 2440 then TP 4392 at San Francisco
Las Vegas → San Francisco → Boston
Timetable, San Francisco time
17:20WN 2440 from Las Vegas at the gate
10:44TP 4392 to Boston leaves the gate
17 h 24 apart on the timetable, overnight
TP 4392 leaves 17 h 24 after WN 2440 arrives on the timetable: more than half a day, so not a connection we count.