UA 3910 then UA 4049 at Houston
Washington → Houston → El Paso
Timetable, Houston time
14:30UA 3910 from Washington at the gate
12:14UA 4049 to El Paso leaves the gate
21 h 44 apart on the timetable, overnight
UA 4049 leaves 21 h 44 after UA 3910 arrives on the timetable: more than half a day, so not a connection we count.