DL 521 then AA 2520 at DFW
Los Angeles → Dallas-Fort Worth → Washington National
Timetable, Dallas-Fort Worth time
15:02DL 521 from Los Angeles at the gate
14:59AA 2520 to Washington National leaves the gate
23 h 57 apart on the timetable, overnight
AA 2520 leaves 23 h 57 after DL 521 arrives on the timetable: more than half a day, so not a connection we count.