UA 3756 then AA 3177 at O'Hare
Lafayette → Chicago → Philadelphia
Timetable, Chicago time
06:14UA 3756 from Lafayette at the gate
21:11AA 3177 to Philadelphia leaves the gate
14 h 57 apart on the timetable
AA 3177 leaves 14 h 57 after UA 3756 arrives on the timetable: more than half a day, so not a connection we count.