UA 4641 then WN 1320 at Denver
Durango → Denver → Birmingham (Alabama)
Timetable, Denver time
06:34UA 4641 from Durango at the gate
18:45WN 1320 to Birmingham (Alabama) leaves the gate
12 h 11 apart on the timetable
WN 1320 leaves 12 h 11 after UA 4641 arrives on the timetable: more than half a day, so not a connection we count.