AA 4504 then UA 2672 at O'Hare
South Bend → Chicago → Pensacola
Timetable, Chicago time
18:35AA 4504 from South Bend at the gate
10:47UA 2672 to Pensacola leaves the gate
16 h 12 apart on the timetable, overnight
UA 2672 leaves 16 h 12 after AA 4504 arrives on the timetable: more than half a day, so not a connection we count.