UA 5192 then AA 4330 at O'Hare
Jacksonville → Chicago → Springfield (SPI)
Timetable, Chicago time
17:30UA 5192 from Jacksonville at the gate
13:28AA 4330 to Springfield (SPI) leaves the gate
19 h 58 apart on the timetable, overnight
AA 4330 leaves 19 h 58 after UA 5192 arrives on the timetable: more than half a day, so not a connection we count.