AS 613 then B6 434 at San Francisco
Las Vegas → San Francisco → Boston
Timetable, San Francisco time
12:16AS 613 from Las Vegas at the gatealso QR 2995, QF 3750, AA 7419
07:30B6 434 to Boston leaves the gatealso TP 4394, FI 7832
19 h 14 apart on the timetable, overnight
B6 434 leaves 19 h 14 after AS 613 arrives on the timetable: more than half a day, so not a connection we count.