DL 3808 then DL 3559 at Salt Lake City
Missoula → Salt Lake City → Northwest Arkansas
Timetable, Salt Lake City time
20:10DL 3808 from Missoula at the gate
17:10DL 3559 to Northwest Arkansas leaves the gate
21 h apart on the timetable, overnight
DL 3559 leaves 21 h after DL 3808 arrives on the timetable: more than half a day, so not a connection we count.