AA 642 then UA 2672 at O'Hare
Dallas-Fort Worth → Chicago → Pensacola
Timetable, Chicago time
13:10AA 642 from Dallas-Fort Worth at the gate
10:57UA 2672 to Pensacola leaves the gate
21 h 47 apart on the timetable, overnight
UA 2672 leaves 21 h 47 after AA 642 arrives on the timetable: more than half a day, so not a connection we count.