UA 3756 then AA 4504 at O'Hare
Lafayette → Chicago → Philadelphia
Timetable, Chicago time
06:14UA 3756 from Lafayette at the gate
19:59AA 4504 to Philadelphia leaves the gate
13 h 45 apart on the timetable
AA 4504 leaves 13 h 45 after UA 3756 arrives on the timetable: more than half a day, so not a connection we count.