| Porsgrunn to Belvedere Marittimo | 1,374.04 mi (2,211.30 km) |
| Porsgrunn to Benevento | 1,261.73 mi (2,030.56 km) |
| Porsgrunn to Bergamo | 927.28 mi (1,492.31 km) |
| Porsgrunn to Bernalda | 1,327.20 mi (2,135.93 km) |
| Porsgrunn to Bertinoro | 1,039.06 mi (1,672.21 km) |
| Porsgrunn to Besana in Brianza | 927.10 mi (1,492.02 km) |
| Porsgrunn to Besozzo | 917.59 mi (1,476.71 km) |
| Porsgrunn to Biancavilla | 1,500.82 mi (2,415.34 km) |
| Porsgrunn to Biassono | 931.72 mi (1,499.46 km) |
| Porsgrunn to Bibbiano | 998.83 mi (1,607.46 km) |
| Porsgrunn to Bibbiena | 1,068.84 mi (1,720.14 km) |
| Porsgrunn to Biella | 938.63 mi (1,510.58 km) |
| Porsgrunn to Bisceglie | 1,269.38 mi (2,042.87 km) |
| Porsgrunn to Bisignano | 1,384.55 mi (2,228.21 km) |
| Porsgrunn to Bitetto | 1,286.08 mi (2,069.74 km) |
