| Willebroek to Southern Pines (North Carolina) | 4,127.11 mi (6,641.95 km) |
| Willebroek to Southfield (Michigan) | 3,939.07 mi (6,339.31 km) |
| Willebroek to Southgate (Michigan) | 3,949.44 mi (6,356.01 km) |
| Willebroek to Southlake (Texas) | 4,937.84 mi (7,946.68 km) |
| Willebroek to Spanaway (Washington) | 4,955.58 mi (7,975.23 km) |
| Willebroek to Spanish Fork (Utah) | 5,051.92 mi (8,130.28 km) |
| Willebroek to Spanish Lake (Missouri) | 4,378.42 mi (7,046.38 km) |
| Willebroek to Spanish Springs (Nevada) | 5,317.39 mi (8,557.51 km) |
| Willebroek to Sparks (Nevada) | 5,323.58 mi (8,567.47 km) |
| Willebroek to Spartanburg (South Carolina) | 4,241.54 mi (6,826.10 km) |
| Willebroek to Spearfish (South Dakota) | 4,566.60 mi (7,349.23 km) |
| Willebroek to Speedway (Indiana) | 4,178.98 mi (6,725.41 km) |
| Willebroek to Spencer (Iowa) | 4,343.34 mi (6,989.93 km) |
| Willebroek to Spokane (Washington) | 4,794.25 mi (7,715.60 km) |
| Willebroek to Spokane Valley (Washington) | 4,789.23 mi (7,707.52 km) |
