| Willoughby to Jeffersontown (Kentucky) | 324.19 mi (521.73 km) |
| Willoughby to Jeffersonville (Indiana) | 322.28 mi (518.66 km) |
| Willoughby to Jenison (Michigan) | 242.05 mi (389.55 km) |
| Willoughby to Jenks (Oklahoma) | 874.21 mi (1,406.90 km) |
| Willoughby to Jennings (Missouri) | 508.90 mi (818.99 km) |
| Willoughby to Jensen Beach (Florida) | 997.28 mi (1,604.97 km) |
| Willoughby to Jericho (New York) | 412.99 mi (664.65 km) |
| Willoughby to Jerome (Idaho) | 1,685.81 mi (2,713.05 km) |
| Willoughby to Jersey City (New Jersey) | 386.89 mi (622.65 km) |
| Willoughby to Jessup (Maryland) | 298.51 mi (480.41 km) |
| Willoughby to Johns Creek (Georgia) | 547.54 mi (881.19 km) |
| Willoughby to Johnson City (New York) | 282.02 mi (453.87 km) |
| Willoughby to Johnson City (Tennessee) | 370.25 mi (595.86 km) |
| Willoughby to Johnston (Iowa) | 635.08 mi (1,022.06 km) |
| Willoughby to Johnstown (Colorado) | 1,226.97 mi (1,974.62 km) |
