AA 4504 then UA 5441 at O'Hare
South Bend → Chicago → Greenville-Spartanburg
Timetable, Chicago time
18:35AA 4504 from South Bend at the gate
17:55UA 5441 to Greenville-Spartanburg leaves the gate
23 h 20 apart on the timetable, overnight
UA 5441 leaves 23 h 20 after AA 4504 arrives on the timetable: more than half a day, so not a connection we count.