| Porsgrunn to Barberton (Ohio) | 3,892.73 mi (6,264.75 km) |
| Porsgrunn to Bardstown (Kentucky) | 4,192.51 mi (6,747.20 km) |
| Porsgrunn to Barrington (Illinois) | 4,034.81 mi (6,493.40 km) |
| Porsgrunn to Barstow (California) | 5,264.77 mi (8,472.83 km) |
| Porsgrunn to Bartlesville (Oklahoma) | 4,579.30 mi (7,369.67 km) |
| Porsgrunn to Bartlett (Illinois) | 4,046.71 mi (6,512.56 km) |
| Porsgrunn to Bartlett (Tennessee) | 4,477.61 mi (7,206.01 km) |
| Porsgrunn to Bartow (Florida) | 4,635.49 mi (7,460.10 km) |
| Porsgrunn to Batavia (Illinois) | 4,057.25 mi (6,529.51 km) |
| Porsgrunn to Batavia (New York) | 3,675.38 mi (5,914.96 km) |
| Porsgrunn to Batesville (Arkansas) | 4,503.41 mi (7,247.53 km) |
| Porsgrunn to Baton Rouge (Louisiana) | 4,796.15 mi (7,718.66 km) |
| Porsgrunn to Battle Creek (Michigan) | 3,937.21 mi (6,336.32 km) |
| Porsgrunn to Battle Ground (Washington) | 4,699.69 mi (7,563.42 km) |
| Porsgrunn to Bay City (Michigan) | 3,825.13 mi (6,155.95 km) |
