AA 4504 then UA 1008 at O'Hare
South Bend → Chicago → Santa Barbara
Timetable, Chicago time
18:35AA 4504 from South Bend at the gate
10:04UA 1008 to Santa Barbara leaves the gate
15 h 29 apart on the timetable, overnight
UA 1008 leaves 15 h 29 after AA 4504 arrives on the timetable: more than half a day, so not a connection we count.