UA 3874 then AA 3565 at O'Hare
Chicago → Chicago → Peoria
Timetable, Chicago time
01:21UA 3874 from Chicago at the gate
15:45AA 3565 to Peoria leaves the gate
14 h 24 apart on the timetable
AA 3565 leaves 14 h 24 after UA 3874 arrives on the timetable: more than half a day, so not a connection we count.