| Montecatini Terme to Silver Firs (Washington) | 5,482.85 mi (8,823.80 km) |
| Montecatini Terme to Silver Spring (Maryland) | 4,335.74 mi (6,977.70 km) |
| Montecatini Terme to Silver Springs Shores (Florida) | 4,984.58 mi (8,021.91 km) |
| Montecatini Terme to Silverdale (Washington) | 5,507.60 mi (8,863.63 km) |
| Montecatini Terme to Silverton (Oregon) | 5,666.17 mi (9,118.82 km) |
| Montecatini Terme to Simi Valley (California) | 6,173.88 mi (9,935.90 km) |
| Montecatini Terme to Simpsonville (South Carolina) | 4,745.18 mi (7,636.63 km) |
| Montecatini Terme to Sioux City (Iowa) | 4,964.51 mi (7,989.61 km) |
| Montecatini Terme to Sioux Falls (South Dakota) | 4,927.35 mi (7,929.81 km) |
| Montecatini Terme to Skokie (Illinois) | 4,654.18 mi (7,490.18 km) |
| Montecatini Terme to Sleepy Hollow (New York) | 4,116.58 mi (6,624.99 km) |
| Montecatini Terme to Slidell (Louisiana) | 5,276.78 mi (8,492.16 km) |
| Montecatini Terme to Smithfield (North Carolina) | 4,538.75 mi (7,304.42 km) |
| Montecatini Terme to Smithfield (Utah) | 5,529.93 mi (8,899.56 km) |
| Montecatini Terme to Smithville (Missouri) | 5,043.29 mi (8,116.39 km) |
