| Porsgrunn to Boppard | 619.57 mi (997.10 km) |
| Porsgrunn to Borgentreich | 521.89 mi (839.90 km) |
| Porsgrunn to Borgholzhausen | 487.82 mi (785.06 km) |
| Porsgrunn to Borken | 515.21 mi (829.15 km) |
| Porsgrunn to Borna | 563.43 mi (906.76 km) |
| Porsgrunn to Bornheim | 587.14 mi (944.92 km) |
| Porsgrunn to Bosel | 427.51 mi (688.00 km) |
| Porsgrunn to Bottrop | 535.68 mi (862.10 km) |
| Porsgrunn to Bovenden | 520.06 mi (836.95 km) |
| Porsgrunn to Brackenheim | 693.65 mi (1,116.32 km) |
| Porsgrunn to Brake | 402.27 mi (647.39 km) |
| Porsgrunn to Brakel | 511.63 mi (823.38 km) |
| Porsgrunn to Bramsche | 468.79 mi (754.45 km) |
| Porsgrunn to Brand | 594.75 mi (957.16 km) |
| Porsgrunn to Brand-Erbisdorf | 587.28 mi (945.14 km) |
