| Monroe to Silver Firs (Washington) | 1,889.83 mi (3,041.40 km) |
| Monroe to Silver Spring (Maryland) | 953.95 mi (1,535.23 km) |
| Monroe to Silver Springs Shores (Florida) | 641.44 mi (1,032.30 km) |
| Monroe to Silverdale (Washington) | 1,907.45 mi (3,069.74 km) |
| Monroe to Silverton (Oregon) | 1,850.01 mi (2,977.30 km) |
| Monroe to Simi Valley (California) | 1,538.95 mi (2,476.71 km) |
| Monroe to Simpsonville (South Carolina) | 585.00 mi (941.46 km) |
| Monroe to Sioux City (Iowa) | 728.50 mi (1,172.40 km) |
| Monroe to Sioux Falls (South Dakota) | 802.14 mi (1,290.92 km) |
| Monroe to Skokie (Illinois) | 699.23 mi (1,125.31 km) |
| Monroe to Sleepy Hollow (New York) | 1,164.98 mi (1,874.85 km) |
| Monroe to Slidell (Louisiana) | 205.04 mi (329.98 km) |
| Monroe to Smithfield (North Carolina) | 812.20 mi (1,307.11 km) |
| Monroe to Smithfield (Utah) | 1,258.97 mi (2,026.11 km) |
| Monroe to Smithville (Missouri) | 494.96 mi (796.56 km) |
