| Porsgrunn to Bitonto | 1,279.74 mi (2,059.55 km) |
| Porsgrunn to Bitritto | 1,285.81 mi (2,069.31 km) |
| Porsgrunn to Bollate | 937.62 mi (1,508.95 km) |
| Porsgrunn to Bologna | 1,012.59 mi (1,629.61 km) |
| Porsgrunn to Bolzano | 874.42 mi (1,407.24 km) |
| Porsgrunn to Bomporto | 995.27 mi (1,601.73 km) |
| Porsgrunn to Bonate di Sopra | 928.10 mi (1,493.63 km) |
| Porsgrunn to Bondeno | 985.95 mi (1,586.74 km) |
| Porsgrunn to Bordighera | 1,062.88 mi (1,710.54 km) |
| Porsgrunn to Borgaro Torinese | 968.76 mi (1,559.07 km) |
| Porsgrunn to Borgo a Buggiano | 1,053.34 mi (1,695.18 km) |
| Porsgrunn to Borgo San Dalmazzo | 1,025.65 mi (1,650.63 km) |
| Porsgrunn to Borgo San Lorenzo | 1,050.22 mi (1,690.17 km) |
| Porsgrunn to Borgomanero | 928.37 mi (1,494.06 km) |
| Porsgrunn to Borgoricco | 944.28 mi (1,519.67 km) |
