AA 3815 then UA 747 at O'Hare
Hartford → Chicago → Baltimore
Timetable, Chicago time
20:15AA 3815 from Hartford at the gate
18:29UA 747 to Baltimore leaves the gate
22 h 14 apart on the timetable, overnight
UA 747 leaves 22 h 14 after AA 3815 arrives on the timetable: more than half a day, so not a connection we count.