| Boulder to Sudbury | 4,686.42 mi (7,542.07 km) |
| Boulder to Sunbury | 4,672.87 mi (7,520.25 km) |
| Boulder to Sunderland | 4,499.62 mi (7,241.44 km) |
| Boulder to Sunninghill | 4,665.74 mi (7,508.78 km) |
| Boulder to Surbiton | 4,678.10 mi (7,528.68 km) |
| Boulder to Sutton | 4,683.10 mi (7,536.72 km) |
| Boulder to Sutton Coldfield | 4,578.36 mi (7,368.16 km) |
| Boulder to Sutton in Ashfield | 4,574.77 mi (7,362.39 km) |
| Boulder to Sutton on Hull | 4,580.09 mi (7,370.94 km) |
| Boulder to Swadlincote | 4,578.90 mi (7,369.03 km) |
| Boulder to Swallownest | 4,563.06 mi (7,343.54 km) |
| Boulder to Swanage | 4,652.66 mi (7,487.73 km) |
| Boulder to Swindon | 4,620.28 mi (7,435.63 km) |
| Boulder to Swinton | 4,558.37 mi (7,335.98 km) |
| Boulder to Swinton | 4,522.93 mi (7,278.95 km) |
