| Porvoo to Borgosesia | 1,236.86 mi (1,990.53 km) |
| Porvoo to Boscoreale | 1,437.50 mi (2,313.43 km) |
| Porvoo to Boscotrecase | 1,436.63 mi (2,312.03 km) |
| Porvoo to Botticino Sera | 1,204.40 mi (1,938.29 km) |
| Porvoo to Bovalino Marina | 1,591.70 mi (2,561.59 km) |
| Porvoo to Boves | 1,337.65 mi (2,152.73 km) |
| Porvoo to Boville Ernica | 1,394.13 mi (2,243.64 km) |
| Porvoo to Bovisio Masciago | 1,222.85 mi (1,967.99 km) |
| Porvoo to Bovolone | 1,203.48 mi (1,936.81 km) |
| Porvoo to Bra | 1,308.34 mi (2,105.58 km) |
| Porvoo to Bracciano | 1,385.74 mi (2,230.14 km) |
| Porvoo to Brandizzo | 1,279.57 mi (2,059.27 km) |
| Porvoo to Breganze | 1,166.48 mi (1,877.27 km) |
| Porvoo to Brembate | 1,215.03 mi (1,955.39 km) |
| Porvoo to Brescia | 1,204.32 mi (1,938.17 km) |
