AA 2475 then UA 5539 at O'Hare
Los Angeles → Chicago → Moline
Timetable, Chicago time
05:02AA 2475 from Los Angeles at the gate
21:47UA 5539 to Moline leaves the gate
16 h 45 apart on the timetable
UA 5539 leaves 16 h 45 after AA 2475 arrives on the timetable: more than half a day, so not a connection we count.