UA 5559 then AA 1355 at DFW
Chicago O'Hare → Dallas-Fort Worth → Oklahoma City
Timetable, Dallas-Fort Worth time
16:29UA 5559 from Chicago O'Hare at the gate
13:11AA 1355 to Oklahoma City leaves the gate
20 h 42 apart on the timetable, overnight
AA 1355 leaves 20 h 42 after UA 5559 arrives on the timetable: more than half a day, so not a connection we count.