| Porsgrunn to Blace | 1,198.77 mi (1,929.23 km) |
| Porsgrunn to Bogatic | 1,068.30 mi (1,719.26 km) |
| Porsgrunn to Bojnik | 1,224.28 mi (1,970.28 km) |
| Porsgrunn to Boljevac | 1,176.30 mi (1,893.07 km) |
| Porsgrunn to Bor | 1,159.58 mi (1,866.16 km) |
| Porsgrunn to Borca | 1,082.05 mi (1,741.39 km) |
| Porsgrunn to Bosilegrad | 1,271.05 mi (2,045.56 km) |
| Porsgrunn to Brus | 1,188.40 mi (1,912.55 km) |
| Porsgrunn to Bujanovac | 1,260.61 mi (2,028.76 km) |
| Porsgrunn to Cacak | 1,143.85 mi (1,840.85 km) |
| Porsgrunn to Cajetina | 1,142.90 mi (1,839.33 km) |
| Porsgrunn to Cicevac | 1,174.12 mi (1,889.56 km) |
| Porsgrunn to Coka | 1,008.29 mi (1,622.68 km) |
| Porsgrunn to Crna Trava | 1,247.92 mi (2,008.33 km) |
| Porsgrunn to Crvenka | 1,014.13 mi (1,632.09 km) |
