| London Colney to Silver Firs (Washington) | 4,748.35 mi (7,641.73 km) |
| London Colney to Silver Spring (Maryland) | 3,647.87 mi (5,870.68 km) |
| London Colney to Silver Springs Shores (Florida) | 4,326.43 mi (6,962.71 km) |
| London Colney to Silverdale (Washington) | 4,773.54 mi (7,682.27 km) |
| London Colney to Silverton (Oregon) | 4,929.13 mi (7,932.67 km) |
| London Colney to Simi Valley (California) | 5,428.71 mi (8,736.67 km) |
| London Colney to Simpsonville (South Carolina) | 4,060.64 mi (6,534.96 km) |
| London Colney to Sioux City (Iowa) | 4,227.93 mi (6,804.20 km) |
| London Colney to Sioux Falls (South Dakota) | 4,188.90 mi (6,741.38 km) |
| London Colney to Skokie (Illinois) | 3,930.84 mi (6,326.08 km) |
| London Colney to Sleepy Hollow (New York) | 3,427.49 mi (5,516.01 km) |
| London Colney to Slidell (Louisiana) | 4,585.94 mi (7,380.36 km) |
| London Colney to Smithfield (North Carolina) | 3,863.29 mi (6,217.36 km) |
| London Colney to Smithfield (Utah) | 4,784.76 mi (7,700.33 km) |
| London Colney to Smithville (Missouri) | 4,314.83 mi (6,944.05 km) |
