UA 2348 then DL 3559 at Salt Lake City
Denver → Salt Lake City → Northwest Arkansas
Timetable, Salt Lake City time
17:13UA 2348 from Denver at the gate
17:10DL 3559 to Northwest Arkansas leaves the gate
23 h 57 apart on the timetable, overnight
DL 3559 leaves 23 h 57 after UA 2348 arrives on the timetable: more than half a day, so not a connection we count.