UA 3756 then AA 3297 at O'Hare
Lafayette → Chicago → Dallas-Fort Worth
Timetable, Chicago time
06:14UA 3756 from Lafayette at the gate
21:06AA 3297 to Dallas-Fort Worth leaves the gate
14 h 52 apart on the timetable
AA 3297 leaves 14 h 52 after UA 3756 arrives on the timetable: more than half a day, so not a connection we count.