UA 3908 then AA 3847 at O'Hare
Columbus (Ohio) → Chicago → Springfield (SPI)
Timetable, Chicago time
09:34UA 3908 from Columbus (Ohio) at the gate
23:05AA 3847 to Springfield (SPI) leaves the gate
13 h 31 apart on the timetable
AA 3847 leaves 13 h 31 after UA 3908 arrives on the timetable: more than half a day, so not a connection we count.