DL 1440 then WN 2258 at Salt Lake City
Spokane → Salt Lake City → Las Vegas
Timetable, Salt Lake City time
08:48DL 1440 from Spokane at the gate
21:25WN 2258 to Las Vegas leaves the gate
12 h 37 apart on the timetable
WN 2258 leaves 12 h 37 after DL 1440 arrives on the timetable: more than half a day, so not a connection we count.