| Middle River to Silver Firs (Washington) | 2,325.76 mi (3,742.95 km) |
| Middle River to Silver Spring (Maryland) | 39.64 mi (63.80 km) |
| Middle River to Silver Springs Shores (Florida) | 775.23 mi (1,247.62 km) |
| Middle River to Silverdale (Washington) | 2,351.18 mi (3,783.85 km) |
| Middle River to Silverton (Oregon) | 2,372.62 mi (3,818.36 km) |
| Middle River to Simi Valley (California) | 2,345.97 mi (3,775.47 km) |
| Middle River to Simpsonville (South Carolina) | 452.70 mi (728.55 km) |
| Middle River to Sioux City (Iowa) | 1,062.20 mi (1,709.45 km) |
| Middle River to Sioux Falls (South Dakota) | 1,087.86 mi (1,750.74 km) |
| Middle River to Skokie (Illinois) | 620.72 mi (998.96 km) |
| Middle River to Sleepy Hollow (New York) | 180.99 mi (291.28 km) |
| Middle River to Slidell (Louisiana) | 980.69 mi (1,578.26 km) |
| Middle River to Smithfield (North Carolina) | 284.91 mi (458.52 km) |
| Middle River to Smithfield (Utah) | 1,852.25 mi (2,980.91 km) |
| Middle River to Smithville (Missouri) | 967.82 mi (1,557.56 km) |
