WN 2124 then DL 3876 at Denver
Phoenix Sky Harbor → Denver → Austin
Timetable, Denver time
11:50WN 2124 from Phoenix Sky Harbor at the gate
09:42DL 3876 to Austin leaves the gate
21 h 52 apart on the timetable, overnight
DL 3876 leaves 21 h 52 after WN 2124 arrives on the timetable: more than half a day, so not a connection we count.