PA 89 runs northeast out of the city before arcing back around to the north and passing through the community of Vrooman.

The highway then bypasses Rome and Buells Corners to the east and then continues north through Hatchtown.

After splitting off to the north once again, the highway turns more northwest and meets Pennsylvania Route 8 south of the borough of Wattsburg.

The two routes overlap through Wattsburg (where they meet the western terminus of PA 474) and split up in Lowville.

The northern terminus was also extended to Pennsylvania Route 5 in North East.