| Boppard to Smyrna (Delaware) | 3,934.74 mi (6,332.36 km) |
| Boppard to Smyrna (Georgia) | 4,551.39 mi (7,324.76 km) |
| Boppard to Smyrna (Tennessee) | 4,527.40 mi (7,286.15 km) |
| Boppard to Snellville (Georgia) | 4,531.10 mi (7,292.10 km) |
| Boppard to Snoqualmie (Washington) | 5,042.79 mi (8,115.58 km) |
| Boppard to Snyder (Texas) | 5,240.18 mi (8,433.26 km) |
| Boppard to Socastee (South Carolina) | 4,335.48 mi (6,977.29 km) |
| Boppard to Socorro (Texas) | 5,489.96 mi (8,835.23 km) |
| Boppard to Soddy-Daisy (Tennessee) | 4,509.05 mi (7,256.62 km) |
| Boppard to Solana Beach (California) | 5,774.11 mi (9,292.54 km) |
| Boppard to Soledad (California) | 5,689.49 mi (9,156.34 km) |
| Boppard to Solon (Ohio) | 4,070.72 mi (6,551.20 km) |
| Boppard to Somers Point (New Jersey) | 3,893.02 mi (6,265.21 km) |
| Boppard to Somerset (Kentucky) | 4,397.74 mi (7,077.48 km) |
| Boppard to Somerset (New Jersey) | 3,835.72 mi (6,172.99 km) |
