UA 337 then WN 1837 at Denver
Phoenix Sky Harbor → Denver → Santa Ana
Timetable, Denver time
08:10UA 337 from Phoenix Sky Harbor at the gate
20:30WN 1837 to Santa Ana leaves the gate
12 h 20 apart on the timetable
WN 1837 leaves 12 h 20 after UA 337 arrives on the timetable: more than half a day, so not a connection we count.