| Williamsport to Jeffersontown (Kentucky) | 499.31 mi (803.56 km) |
| Williamsport to Jeffersonville (Indiana) | 501.57 mi (807.20 km) |
| Williamsport to Jenison (Michigan) | 465.04 mi (748.40 km) |
| Williamsport to Jenks (Oklahoma) | 1,081.82 mi (1,741.03 km) |
| Williamsport to Jennings (Missouri) | 720.77 mi (1,159.97 km) |
| Williamsport to Jensen Beach (Florida) | 984.02 mi (1,583.62 km) |
| Williamsport to Jericho (New York) | 184.88 mi (297.53 km) |
| Williamsport to Jerome (Idaho) | 1,911.90 mi (3,076.91 km) |
| Williamsport to Jersey City (New Jersey) | 158.97 mi (255.83 km) |
| Williamsport to Jessup (Maryland) | 145.13 mi (233.56 km) |
| Williamsport to Johns Creek (Georgia) | 633.26 mi (1,019.13 km) |
| Williamsport to Johnson City (New York) | 82.45 mi (132.69 km) |
| Williamsport to Johnson City (Tennessee) | 444.11 mi (714.72 km) |
| Williamsport to Johnston (Iowa) | 863.16 mi (1,389.12 km) |
| Williamsport to Johnstown (Colorado) | 1,454.97 mi (2,341.55 km) |
