| Porsgrunn to Bistrita | 1,025.39 mi (1,650.20 km) |
| Porsgrunn to Blaj | 1,069.37 mi (1,720.98 km) |
| Porsgrunn to Bocsa | 1,072.89 mi (1,726.64 km) |
| Porsgrunn to Boldesti-Scaeni | 1,187.90 mi (1,911.74 km) |
| Porsgrunn to Bolintin Vale | 1,216.85 mi (1,958.34 km) |
| Porsgrunn to Borsa | 998.58 mi (1,607.06 km) |
| Porsgrunn to Botosani | 1,044.79 mi (1,681.42 km) |
| Porsgrunn to Brad | 1,047.53 mi (1,685.83 km) |
| Porsgrunn to Bragadiru | 1,226.57 mi (1,973.97 km) |
| Porsgrunn to Braila | 1,221.48 mi (1,965.78 km) |
| Porsgrunn to Brasov | 1,139.73 mi (1,834.21 km) |
| Porsgrunn to Breaza | 1,169.69 mi (1,882.43 km) |
| Porsgrunn to Bucharest | 1,225.83 mi (1,972.78 km) |
| Porsgrunn to Buftea | 1,213.86 mi (1,953.52 km) |
| Porsgrunn to Buhusi | 1,104.91 mi (1,778.18 km) |
