OO 449 then DL 3559 at Salt Lake City
Denver (DEN) → Salt Lake City → Northwest Arkansas
Timetable, Salt Lake City time
18:25OO 449 from Denver (DEN) at the gate
17:15DL 3559 to Northwest Arkansas leaves the gate
22 h 50 apart on the timetable, overnight
DL 3559 leaves 22 h 50 after OO 449 arrives on the timetable: more than half a day, so not a connection we count.