WN 8501 then DL 3876 at Denver
Reno → Denver → Austin
Timetable, Denver time
17:35WN 8501 from Reno at the gate
12:47DL 3876 to Austin leaves the gate
19 h 12 apart on the timetable, overnight
DL 3876 leaves 19 h 12 after WN 8501 arrives on the timetable: more than half a day, so not a connection we count.