UA 6080 then AA 4990 at O'Hare
Sioux City → Chicago → Kalamazoo
Timetable, Chicago time
07:35UA 6080 from Sioux City at the gate
22:35AA 4990 to Kalamazoo leaves the gate
15 h apart on the timetable
AA 4990 leaves 15 h after UA 6080 arrives on the timetable: more than half a day, so not a connection we count.