WN 347 then DL 1553 at Denver
Birmingham (Alabama) → Denver → Salt Lake City
Timetable, Denver time
18:45WN 347 from Birmingham (Alabama) at the gate
12:53DL 1553 to Salt Lake City leaves the gate
18 h 08 apart on the timetable, overnight
DL 1553 leaves 18 h 08 after WN 347 arrives on the timetable: more than half a day, so not a connection we count.