| Le Mars to Silver Firs (Washington) | 1,302.97 mi (2,096.92 km) |
| Le Mars to Silver Spring (Maryland) | 1,031.34 mi (1,659.78 km) |
| Le Mars to Silver Springs Shores (Florida) | 1,228.93 mi (1,977.78 km) |
| Le Mars to Silverdale (Washington) | 1,326.32 mi (2,134.51 km) |
| Le Mars to Silverton (Oregon) | 1,327.65 mi (2,136.65 km) |
| Le Mars to Simi Valley (California) | 1,349.01 mi (2,171.02 km) |
| Le Mars to Simpsonville (South Carolina) | 931.65 mi (1,499.35 km) |
| Le Mars to Sioux City (Iowa) | 22.57 mi (36.32 km) |
| Le Mars to Sioux Falls (South Dakota) | 59.48 mi (95.72 km) |
| Le Mars to Skokie (Illinois) | 433.11 mi (697.02 km) |
| Le Mars to Sleepy Hollow (New York) | 1,148.74 mi (1,848.72 km) |
| Le Mars to Slidell (Louisiana) | 932.47 mi (1,500.66 km) |
| Le Mars to Smithfield (North Carolina) | 1,075.96 mi (1,731.60 km) |
| Le Mars to Smithfield (Utah) | 801.34 mi (1,289.63 km) |
| Le Mars to Smithville (Missouri) | 248.51 mi (399.94 km) |
