5A 623 then WN 4173 at Salt Lake City
Idaho Falls → Salt Lake City → Sacramento
Timetable, Salt Lake City time
18:255A 623 from Idaho Falls at the gate
15:35WN 4173 to Sacramento leaves the gate
21 h 10 apart on the timetable, overnight
WN 4173 leaves 21 h 10 after 5A 623 arrives on the timetable: more than half a day, so not a connection we count.