AA 1820 then AA 3740 at DFW
Ontario → Dallas-Fort Worth → Acapulco
Timetable, Dallas-Fort Worth time
15:35AA 1820 from Ontario at the gate
11:23AA 3740 to Acapulco leaves the gate
19 h 48 apart on the timetable, overnight
AA 3740 leaves 19 h 48 after AA 1820 arrives on the timetable: more than half a day, so not a connection we count.