UA 3879 then UA 417 at Houston
Amarillo → Houston → Los Angeles
Timetable, Houston time
17:48UA 3879 from Amarillo at the gate
06:10UA 417 to Los Angeles leaves the gate
12 h 22 apart on the timetable, overnight
UA 417 leaves 12 h 22 after UA 3879 arrives on the timetable: more than half a day, so not a connection we count.