UA 3879 then UA 4795 at Houston
Amarillo → Houston → Oklahoma City
Timetable, Houston time
17:48UA 3879 from Amarillo at the gate
07:30UA 4795 to Oklahoma City leaves the gate
13 h 42 apart on the timetable, overnight
UA 4795 leaves 13 h 42 after UA 3879 arrives on the timetable: more than half a day, so not a connection we count.