| Porvoo to Somma Lombardo | 1,228.93 mi (1,977.77 km) |
| Porvoo to Somma Vesuviana | 1,431.12 mi (2,303.16 km) |
| Porvoo to Sommacampagna | 1,199.83 mi (1,930.93 km) |
| Porvoo to Sona | 1,198.09 mi (1,928.13 km) |
| Porvoo to Sondrio | 1,172.98 mi (1,887.73 km) |
| Porvoo to Sora | 1,387.40 mi (2,232.81 km) |
| Porvoo to Sorbolo | 1,242.77 mi (2,000.04 km) |
| Porvoo to Soresina | 1,227.74 mi (1,975.86 km) |
| Porvoo to Sorisole | 1,204.23 mi (1,938.02 km) |
| Porvoo to Sorrento | 1,448.29 mi (2,330.79 km) |
| Porvoo to Sorso | 1,536.99 mi (2,473.54 km) |
| Porvoo to Sortino | 1,671.40 mi (2,689.86 km) |
| Porvoo to Soverato Marina | 1,551.36 mi (2,496.67 km) |
| Porvoo to Sovicille | 1,326.43 mi (2,134.69 km) |
| Porvoo to Spello | 1,319.53 mi (2,123.58 km) |
