F9 2350 then UA 2128 at Denver
Las Vegas → Denver → El Paso
Timetable, Denver time
14:41F9 2350 from Las Vegas at the gate
11:35UA 2128 to El Paso leaves the gate
20 h 54 apart on the timetable, overnight
UA 2128 leaves 20 h 54 after F9 2350 arrives on the timetable: more than half a day, so not a connection we count.