AA 1578 then AA 3740 at DFW
Ontario → Dallas-Fort Worth → Acapulco
Timetable, Dallas-Fort Worth time
12:12AA 1578 from Ontario at the gate
11:23AA 3740 to Acapulco leaves the gate
23 h 11 apart on the timetable, overnight
AA 3740 leaves 23 h 11 after AA 1578 arrives on the timetable: more than half a day, so not a connection we count.