| Porsgrunn to Beyne-Heusay | 608.72 mi (979.64 km) |
| Porsgrunn to Bierbeek | 604.49 mi (972.83 km) |
| Porsgrunn to Bilzen | 593.39 mi (954.97 km) |
| Porsgrunn to Binche | 640.93 mi (1,031.48 km) |
| Porsgrunn to Bissegem | 627.89 mi (1,010.49 km) |
| Porsgrunn to Blankenberge | 598.64 mi (963.42 km) |
| Porsgrunn to Blegny | 604.50 mi (972.85 km) |
| Porsgrunn to Bocholt | 572.29 mi (921.00 km) |
| Porsgrunn to Boechout | 587.38 mi (945.30 km) |
| Porsgrunn to Bonheiden | 594.36 mi (956.53 km) |
| Porsgrunn to Boom | 593.36 mi (954.92 km) |
| Porsgrunn to Boortmeerbeek | 597.20 mi (961.10 km) |
| Porsgrunn to Borgerhout | 583.93 mi (939.74 km) |
| Porsgrunn to Borgloon | 599.63 mi (965.02 km) |
| Porsgrunn to Bornem | 594.14 mi (956.18 km) |
