| Keystone to Sestu | 5,101.18 mi (8,209.55 km) |
| Keystone to Settimo Torinese | 4,886.26 mi (7,863.67 km) |
| Keystone to Seveso | 4,935.49 mi (7,942.90 km) |
| Keystone to Sezze | 5,229.52 mi (8,416.11 km) |
| Keystone to Siano | 5,326.72 mi (8,572.52 km) |
| Keystone to Siena | 5,097.08 mi (8,202.95 km) |
| Keystone to Signa | 5,073.65 mi (8,165.25 km) |
| Keystone to Silea | 5,076.08 mi (8,169.16 km) |
| Keystone to Silvi Paese | 5,247.28 mi (8,444.69 km) |
| Keystone to Sinalunga | 5,118.41 mi (8,237.29 km) |
| Keystone to Siniscola | 5,095.60 mi (8,200.57 km) |
| Keystone to Sinnai | 5,106.55 mi (8,218.20 km) |
| Keystone to Siracusa | 5,471.12 mi (8,804.92 km) |
| Keystone to Solaro | 4,933.80 mi (7,940.19 km) |
| Keystone to Soliera | 5,039.72 mi (8,110.65 km) |
