UA 1590 then AA 1355 at DFW
Newark → Dallas-Fort Worth → Oklahoma City
Timetable, Dallas-Fort Worth time
18:32UA 1590 from Newark at the gate
13:11AA 1355 to Oklahoma City leaves the gate
18 h 39 apart on the timetable, overnight
AA 1355 leaves 18 h 39 after UA 1590 arrives on the timetable: more than half a day, so not a connection we count.