UA 5355 then WN 971 at Denver
Salt Lake City → Denver → Spokane
Timetable, Denver time
12:24UA 5355 from Salt Lake City at the gate
08:35WN 971 to Spokane leaves the gate
20 h 11 apart on the timetable, overnight
WN 971 leaves 20 h 11 after UA 5355 arrives on the timetable: more than half a day, so not a connection we count.