F9 4559 then AA 3740 at DFW
Washington → Dallas-Fort Worth → Acapulco
Timetable, Dallas-Fort Worth time
15:09F9 4559 from Washington at the gate
11:23AA 3740 to Acapulco leaves the gate
20 h 14 apart on the timetable, overnight
AA 3740 leaves 20 h 14 after F9 4559 arrives on the timetable: more than half a day, so not a connection we count.