| Westerlo to Silver Firs (Washington) | 4,916.61 mi (7,912.52 km) |
| Westerlo to Silver Spring (Maryland) | 3,874.21 mi (6,234.94 km) |
| Westerlo to Silver Springs Shores (Florida) | 4,555.01 mi (7,330.57 km) |
| Westerlo to Silverdale (Washington) | 4,941.24 mi (7,952.16 km) |
| Westerlo to Silverton (Oregon) | 5,100.73 mi (8,208.84 km) |
| Westerlo to Simi Valley (California) | 5,621.18 mi (9,046.42 km) |
| Westerlo to Simpsonville (South Carolina) | 4,287.19 mi (6,899.57 km) |
| Westerlo to Sioux City (Iowa) | 4,437.70 mi (7,141.79 km) |
| Westerlo to Sioux Falls (South Dakota) | 4,396.99 mi (7,076.28 km) |
| Westerlo to Skokie (Illinois) | 4,148.52 mi (6,676.40 km) |
| Westerlo to Sleepy Hollow (New York) | 3,653.80 mi (5,880.22 km) |
| Westerlo to Slidell (Louisiana) | 4,811.40 mi (7,743.20 km) |
| Westerlo to Smithfield (North Carolina) | 4,090.86 mi (6,583.61 km) |
| Westerlo to Smithfield (Utah) | 4,977.54 mi (8,010.58 km) |
| Westerlo to Smithville (Missouri) | 4,529.85 mi (7,290.09 km) |
