B6 833 then AC 4104 at San Francisco
Boston → San Francisco → Las Vegas
Timetable, San Francisco time
20:55B6 833 from Boston at the gatealso EY 8011
16:40AC 4104 to Las Vegas leaves the gatealso AZ 4491, EK 6366, LH 7990, VA 8119, NZ 9226
19 h 45 apart on the timetable, overnight
AC 4104 leaves 19 h 45 after B6 833 arrives on the timetable: more than half a day, so not a connection we count.