| South Plainfield to Smithville (Missouri) | 1,068.06 mi (1,718.87 km) |
| South Plainfield to Smyrna (Delaware) | 108.78 mi (175.06 km) |
| South Plainfield to Smyrna (Georgia) | 722.97 mi (1,163.51 km) |
| South Plainfield to Smyrna (Tennessee) | 729.10 mi (1,173.38 km) |
| South Plainfield to Snellville (Georgia) | 701.96 mi (1,129.69 km) |
| South Plainfield to Snoqualmie (Washington) | 2,365.30 mi (3,806.58 km) |
| South Plainfield to Snyder (Texas) | 1,558.79 mi (2,508.63 km) |
| South Plainfield to Socastee (South Carolina) | 538.77 mi (867.07 km) |
| South Plainfield to Socorro (Texas) | 1,869.72 mi (3,009.03 km) |
| South Plainfield to Soddy-Daisy (Tennessee) | 691.25 mi (1,112.46 km) |
| South Plainfield to Solana Beach (California) | 2,403.32 mi (3,867.77 km) |
| South Plainfield to Soledad (California) | 2,523.21 mi (4,060.71 km) |
| South Plainfield to Solon (Ohio) | 370.58 mi (596.39 km) |
| South Plainfield to Somers Point (New Jersey) | 87.52 mi (140.84 km) |
| South Plainfield to Somerset (Kentucky) | 598.97 mi (963.96 km) |
