| Union Park to Smithville (Missouri) | 1,067.10 mi (1,717.33 km) |
| Union Park to Smyrna (Delaware) | 807.92 mi (1,300.22 km) |
| Union Park to Smyrna (Georgia) | 414.14 mi (666.50 km) |
| Union Park to Smyrna (Tennessee) | 597.38 mi (961.40 km) |
| Union Park to Snellville (Georgia) | 400.42 mi (644.42 km) |
| Union Park to Snoqualmie (Washington) | 2,528.07 mi (4,068.53 km) |
| Union Park to Snyder (Texas) | 1,202.31 mi (1,934.93 km) |
| Union Park to Socastee (South Carolina) | 377.54 mi (607.59 km) |
| Union Park to Socorro (Texas) | 1,507.47 mi (2,426.04 km) |
| Union Park to Soddy-Daisy (Tennessee) | 516.69 mi (831.53 km) |
| Union Park to Solana Beach (California) | 2,149.58 mi (3,459.41 km) |
| Union Park to Soledad (California) | 2,381.67 mi (3,832.93 km) |
| Union Park to Solon (Ohio) | 885.91 mi (1,425.73 km) |
| Union Park to Somers Point (New Jersey) | 833.73 mi (1,341.76 km) |
| Union Park to Somerset (Kentucky) | 620.16 mi (998.05 km) |
