AA 4504 then UA 5709 at O'Hare
South Bend → Chicago → Providence
Timetable, Chicago time
18:35AA 4504 from South Bend at the gate
12:25UA 5709 to Providence leaves the gate
17 h 50 apart on the timetable, overnight
UA 5709 leaves 17 h 50 after AA 4504 arrives on the timetable: more than half a day, so not a connection we count.