DL 521 then AA 1868 at DFW
Los Angeles → Dallas-Fort Worth → Pittsburgh
Timetable, Dallas-Fort Worth time
15:02DL 521 from Los Angeles at the gate
15:00AA 1868 to Pittsburgh leaves the gate
23 h 58 apart on the timetable, overnight
AA 1868 leaves 23 h 58 after DL 521 arrives on the timetable: more than half a day, so not a connection we count.