AA 4504 then UA 5344 at O'Hare
South Bend → Chicago → Spokane
Timetable, Chicago time
18:35AA 4504 from South Bend at the gate
10:00UA 5344 to Spokane leaves the gate
15 h 25 apart on the timetable, overnight
UA 5344 leaves 15 h 25 after AA 4504 arrives on the timetable: more than half a day, so not a connection we count.