After passing under the railroad tracks, SR 317 passes to the east of Port Columbus International Airport. The road has an interchange with I–270, at the northeast corner of the airport. North of I–270, SR 317 leaves Columbus for the final time and it enters Gahanna. Between I–270 and Rocky Fork Boulevard, SR 317 has its highest AADT at 36,870 vehicles. The highway continues north passing through residential, on the west side of the road, and commercial properties, on the east side of the road. The highway makes a sharp curve, turning due west, and passes through commercial properties. SR 317 end at a T-intersection with US 62 in Gahanna, SR 317 enters the intersection from the east and US 62 enters from the west and north. The highway is not incorporated within the National Highway System.