B6 833 then UA 400 at San Francisco
Boston → San Francisco → Burbank
Timetable, San Francisco time
20:55B6 833 from Boston at the gatealso EY 8011
17:55UA 400 to Burbank leaves the gatealso AC 4113
21 h apart on the timetable, overnight
UA 400 leaves 21 h after B6 833 arrives on the timetable: more than half a day, so not a connection we count.