AA 4185 then UA 5940 at O'Hare
Marquette → Chicago → Peoria
Timetable, Chicago time
17:27AA 4185 from Marquette at the gate
16:40UA 5940 to Peoria leaves the gate
23 h 13 apart on the timetable, overnight
UA 5940 leaves 23 h 13 after AA 4185 arrives on the timetable: more than half a day, so not a connection we count.