| Boadilla del Monte to Silver Firs (Washington) | 5,264.29 mi (8,472.06 km) |
| Boadilla del Monte to Silver Spring (Maryland) | 3,771.30 mi (6,069.32 km) |
| Boadilla del Monte to Silver Springs Shores (Florida) | 4,361.28 mi (7,018.80 km) |
| Boadilla del Monte to Silverdale (Washington) | 5,291.22 mi (8,515.39 km) |
| Boadilla del Monte to Silverton (Oregon) | 5,428.83 mi (8,736.85 km) |
| Boadilla del Monte to Simi Valley (California) | 5,820.77 mi (9,367.63 km) |
| Boadilla del Monte to Simpsonville (South Carolina) | 4,167.00 mi (6,706.14 km) |
| Boadilla del Monte to Sioux City (Iowa) | 4,531.87 mi (7,293.34 km) |
| Boadilla del Monte to Sioux Falls (South Dakota) | 4,506.77 mi (7,252.94 km) |
| Boadilla del Monte to Skokie (Illinois) | 4,170.77 mi (6,712.21 km) |
| Boadilla del Monte to Sleepy Hollow (New York) | 3,559.07 mi (5,727.77 km) |
| Boadilla del Monte to Slidell (Louisiana) | 4,701.57 mi (7,566.44 km) |
| Boadilla del Monte to Smithfield (North Carolina) | 3,948.67 mi (6,354.77 km) |
| Boadilla del Monte to Smithfield (Utah) | 5,187.46 mi (8,348.40 km) |
| Boadilla del Monte to Smithville (Missouri) | 4,571.22 mi (7,356.67 km) |
