AA 2074 then DL 508 at Boston
Chicago O'Hare → Boston → Los Angeles
Timetable, Boston time
17:08AA 2074 from Chicago O'Hare at the gate
16:15DL 508 to Los Angeles leaves the gate
23 h 07 apart on the timetable, overnight
DL 508 leaves 23 h 07 after AA 2074 arrives on the timetable: more than half a day, so not a connection we count.