| Porvoo to Settimo Torinese | 1,283.86 mi (2,066.17 km) |
| Porvoo to Seveso | 1,221.50 mi (1,965.81 km) |
| Porvoo to Sezze | 1,410.32 mi (2,269.69 km) |
| Porvoo to Siano | 1,432.16 mi (2,304.83 km) |
| Porvoo to Siena | 1,322.35 mi (2,128.11 km) |
| Porvoo to Signa | 1,297.02 mi (2,087.35 km) |
| Porvoo to Silea | 1,155.04 mi (1,858.86 km) |
| Porvoo to Silvi Paese | 1,324.79 mi (2,132.04 km) |
| Porvoo to Sinalunga | 1,321.43 mi (2,126.64 km) |
| Porvoo to Siniscola | 1,529.53 mi (2,461.55 km) |
| Porvoo to Sinnai | 1,620.94 mi (2,608.66 km) |
| Porvoo to Siracusa | 1,674.90 mi (2,695.49 km) |
| Porvoo to Solaro | 1,224.43 mi (1,970.54 km) |
| Porvoo to Soliera | 1,239.91 mi (1,995.45 km) |
| Porvoo to Solofra | 1,427.95 mi (2,298.07 km) |
