AA 6331 then DL 1556 at O'Hare
Burlington (BTV) → Chicago → Los Angeles
Timetable, Chicago time
08:59AA 6331 from Burlington (BTV) at the gate
07:45DL 1556 to Los Angeles leaves the gate
22 h 46 apart on the timetable, overnight
DL 1556 leaves 22 h 46 after AA 6331 arrives on the timetable: more than half a day, so not a connection we count.