| Porvoo to Siran | 1,510.42 mi (2,430.79 km) |
| Porvoo to Sirnak | 1,742.84 mi (2,804.83 km) |
| Porvoo to Sirvan | 1,699.58 mi (2,735.21 km) |
| Porvoo to Sivas | 1,507.63 mi (2,426.30 km) |
| Porvoo to Sivasli | 1,523.97 mi (2,452.59 km) |
| Porvoo to Siverek | 1,674.43 mi (2,694.73 km) |
| Porvoo to Sivrice | 1,628.25 mi (2,620.41 km) |
| Porvoo to Sivrihisar | 1,469.14 mi (2,364.35 km) |
| Porvoo to Sogut | 1,421.14 mi (2,287.10 km) |
| Porvoo to Sogutlu | 1,362.51 mi (2,192.74 km) |
| Porvoo to Soke | 1,566.39 mi (2,520.85 km) |
| Porvoo to Solhan | 1,623.14 mi (2,612.20 km) |
| Porvoo to Soma | 1,467.61 mi (2,361.89 km) |
| Porvoo to Sorgun | 1,479.75 mi (2,381.43 km) |
| Porvoo to Suhut | 1,525.44 mi (2,454.96 km) |
