AA 3615 then AA 1974 at DFW
Springfield → Dallas-Fort Worth → Chicago O'Hare
Timetable, Dallas-Fort Worth time
10:18AA 3615 from Springfield at the gate
06:12AA 1974 to Chicago O'Hare leaves the gate
19 h 54 apart on the timetable, overnight
AA 1974 leaves 19 h 54 after AA 3615 arrives on the timetable: more than half a day, so not a connection we count.