UA 5191 then AA 3967 at Houston
Oklahoma City → Houston → Dallas-Fort Worth
Timetable, Houston time
09:30UA 5191 from Oklahoma City at the gate
08:57AA 3967 to Dallas-Fort Worth leaves the gate
23 h 27 apart on the timetable, overnight
AA 3967 leaves 23 h 27 after UA 5191 arrives on the timetable: more than half a day, so not a connection we count.