AA 1922 then AA 1838 at DFW
Las Vegas → Dallas-Fort Worth → Chicago O'Hare
Timetable, Dallas-Fort Worth time
19:06AA 1922 from Las Vegas at the gate
15:52AA 1838 to Chicago O'Hare leaves the gate
20 h 46 apart on the timetable, overnight
AA 1838 leaves 20 h 46 after AA 1922 arrives on the timetable: more than half a day, so not a connection we count.