| Keystone to Snodland | 4,437.59 mi (7,141.61 km) |
| Keystone to Soham | 4,417.02 mi (7,108.50 km) |
| Keystone to Solihull | 4,328.71 mi (6,966.38 km) |
| Keystone to Sompting | 4,412.37 mi (7,101.02 km) |
| Keystone to South Hayling | 4,385.92 mi (7,058.45 km) |
| Keystone to South Normanton | 4,337.04 mi (6,979.79 km) |
| Keystone to South Ockendon | 4,428.16 mi (7,126.43 km) |
| Keystone to South Shields | 4,308.92 mi (6,934.54 km) |
| Keystone to Southall | 4,400.09 mi (7,081.26 km) |
| Keystone to Southampton | 4,365.99 mi (7,026.39 km) |
| Keystone to Southborough | 4,432.68 mi (7,133.71 km) |
| Keystone to Southbourne | 4,351.87 mi (7,003.66 km) |
| Keystone to Southend | 4,445.00 mi (7,153.54 km) |
| Keystone to Southgate | 4,408.76 mi (7,095.22 km) |
| Keystone to Southport | 4,262.81 mi (6,860.32 km) |
