AA 3815 then AM 687 at O'Hare
Hartford → Chicago → Mexico City
Timetable, Chicago time
20:15AA 3815 from Hartford at the gate
15:26AM 687 to Mexico City leaves the gate
19 h 11 apart on the timetable, overnight
AM 687 leaves 19 h 11 after AA 3815 arrives on the timetable: more than half a day, so not a connection we count.