AA 642 then UA 6058 at O'Hare
Dallas-Fort Worth → Chicago → Lancaster
Timetable, Chicago time
13:10AA 642 from Dallas-Fort Worth at the gate
12:59UA 6058 to Lancaster leaves the gate
23 h 49 apart on the timetable, overnight
UA 6058 leaves 23 h 49 after AA 642 arrives on the timetable: more than half a day, so not a connection we count.