| Willebroek to Smyrna (Delaware) | 3,782.18 mi (6,086.83 km) |
| Willebroek to Smyrna (Georgia) | 4,398.86 mi (7,079.27 km) |
| Willebroek to Smyrna (Tennessee) | 4,375.22 mi (7,041.24 km) |
| Willebroek to Snellville (Georgia) | 4,378.55 mi (7,046.59 km) |
| Willebroek to Snoqualmie (Washington) | 4,915.82 mi (7,911.25 km) |
| Willebroek to Snyder (Texas) | 5,090.53 mi (8,192.41 km) |
| Willebroek to Socastee (South Carolina) | 4,183.08 mi (6,732.01 km) |
| Willebroek to Socorro (Texas) | 5,342.06 mi (8,597.21 km) |
| Willebroek to Soddy-Daisy (Tennessee) | 4,356.65 mi (7,011.35 km) |
| Willebroek to Solana Beach (California) | 5,633.41 mi (9,066.10 km) |
| Willebroek to Soledad (California) | 5,554.10 mi (8,938.47 km) |
| Willebroek to Solon (Ohio) | 3,918.85 mi (6,306.77 km) |
| Willebroek to Somers Point (New Jersey) | 3,740.46 mi (6,019.69 km) |
| Willebroek to Somerset (Kentucky) | 4,245.50 mi (6,832.48 km) |
| Willebroek to Somerset (New Jersey) | 3,683.16 mi (5,927.47 km) |
