UA 5355 then UA 644 at Denver
Salt Lake City → Denver → Portland (Oregon)
Timetable, Denver time
12:24UA 5355 from Salt Lake City at the gate
11:31UA 644 to Portland (Oregon) leaves the gate
23 h 07 apart on the timetable, overnight
UA 644 leaves 23 h 07 after UA 5355 arrives on the timetable: more than half a day, so not a connection we count.