AA 3324 then UA 1193 at O'Hare
Boston → Chicago → Sacramento
Timetable, Chicago time
08:00AA 3324 from Boston at the gate
20:21UA 1193 to Sacramento leaves the gate
12 h 21 apart on the timetable
UA 1193 leaves 12 h 21 after AA 3324 arrives on the timetable: more than half a day, so not a connection we count.