| Porsgrunn to Borgosatollo | 942.66 mi (1,517.06 km) |
| Porsgrunn to Borgosesia | 927.71 mi (1,493.01 km) |
| Porsgrunn to Boscoreale | 1,284.63 mi (2,067.42 km) |
| Porsgrunn to Boscotrecase | 1,283.38 mi (2,065.40 km) |
| Porsgrunn to Botticino Sera | 938.70 mi (1,510.69 km) |
| Porsgrunn to Bovalino Marina | 1,476.65 mi (2,376.44 km) |
| Porsgrunn to Boves | 1,025.40 mi (1,650.22 km) |
| Porsgrunn to Boville Ernica | 1,217.58 mi (1,959.50 km) |
| Porsgrunn to Bovisio Masciago | 932.97 mi (1,501.48 km) |
| Porsgrunn to Bovolone | 959.86 mi (1,544.75 km) |
| Porsgrunn to Bra | 999.07 mi (1,607.85 km) |
| Porsgrunn to Bracciano | 1,180.45 mi (1,899.76 km) |
| Porsgrunn to Brandizzo | 966.26 mi (1,555.05 km) |
| Porsgrunn to Breganze | 930.13 mi (1,496.91 km) |
| Porsgrunn to Brembate | 933.86 mi (1,502.90 km) |
