AA 3815 then UA 953 at O'Hare
Hartford → Chicago → Munich
Timetable, Chicago time
20:15AA 3815 from Hartford at the gate
18:00UA 953 to Munich leaves the gate
21 h 45 apart on the timetable, overnight
UA 953 leaves 21 h 45 after AA 3815 arrives on the timetable: more than half a day, so not a connection we count.