B6 833 then BA 1782 at San Francisco
Boston → San Francisco → Chicago O'Hare
Timetable, San Francisco time
20:55B6 833 from Boston at the gatealso EY 8011
14:18BA 1782 to Chicago O'Hare leaves the gatealso AA 1948, AY 4140
17 h 23 apart on the timetable, overnight
BA 1782 leaves 17 h 23 after B6 833 arrives on the timetable: more than half a day, so not a connection we count.