| Fallbrook to Silver Firs (Washington) | 1,033.65 mi (1,663.50 km) |
| Fallbrook to Silver Spring (Maryland) | 2,256.97 mi (3,632.25 km) |
| Fallbrook to Silver Springs Shores (Florida) | 2,090.80 mi (3,364.81 km) |
| Fallbrook to Silverdale (Washington) | 1,027.89 mi (1,654.23 km) |
| Fallbrook to Silverton (Oregon) | 856.55 mi (1,378.48 km) |
| Fallbrook to Simi Valley (California) | 107.17 mi (172.47 km) |
| Fallbrook to Simpsonville (South Carolina) | 1,994.02 mi (3,209.07 km) |
| Fallbrook to Sioux City (Iowa) | 1,293.76 mi (2,082.11 km) |
| Fallbrook to Sioux Falls (South Dakota) | 1,307.29 mi (2,103.89 km) |
| Fallbrook to Skokie (Illinois) | 1,709.13 mi (2,750.59 km) |
| Fallbrook to Sleepy Hollow (New York) | 2,418.05 mi (3,891.48 km) |
| Fallbrook to Slidell (Louisiana) | 1,620.27 mi (2,607.58 km) |
| Fallbrook to Smithfield (North Carolina) | 2,205.90 mi (3,550.06 km) |
| Fallbrook to Smithfield (Utah) | 655.00 mi (1,054.11 km) |
| Fallbrook to Smithville (Missouri) | 1,322.72 mi (2,128.72 km) |
