AA 1066 then AA 1974 at DFW
Mexico City → Dallas-Fort Worth → Chicago O'Hare
Timetable, Dallas-Fort Worth time
08:35AA 1066 from Mexico City at the gate
06:12AA 1974 to Chicago O'Hare leaves the gate
21 h 37 apart on the timetable, overnight
AA 1974 leaves 21 h 37 after AA 1066 arrives on the timetable: more than half a day, so not a connection we count.