| Slupca to Smyrna (Delaware) | 4,270.69 mi (6,873.01 km) |
| Slupca to Smyrna (Georgia) | 4,878.74 mi (7,851.57 km) |
| Slupca to Smyrna (Tennessee) | 4,837.91 mi (7,785.86 km) |
| Slupca to Snellville (Georgia) | 4,860.45 mi (7,822.13 km) |
| Slupca to Snoqualmie (Washington) | 5,141.55 mi (8,274.53 km) |
| Slupca to Snyder (Texas) | 5,502.32 mi (8,855.13 km) |
| Slupca to Socastee (South Carolina) | 4,684.08 mi (7,538.30 km) |
| Slupca to Socorro (Texas) | 5,730.44 mi (9,222.26 km) |
| Slupca to Soddy-Daisy (Tennessee) | 4,827.95 mi (7,769.84 km) |
| Slupca to Solana Beach (California) | 5,951.36 mi (9,577.79 km) |
| Slupca to Soledad (California) | 5,831.57 mi (9,385.01 km) |
| Slupca to Solon (Ohio) | 4,375.43 mi (7,041.57 km) |
| Slupca to Somers Point (New Jersey) | 4,232.33 mi (6,811.28 km) |
| Slupca to Somerset (Kentucky) | 4,710.81 mi (7,581.31 km) |
| Slupca to Somerset (New Jersey) | 4,169.61 mi (6,710.34 km) |
