| Porsgrunn to Bonita (California) | 5,402.23 mi (8,694.05 km) |
| Porsgrunn to Bonita Springs (Florida) | 4,722.31 mi (7,599.82 km) |
| Porsgrunn to Bonney Lake (Washington) | 4,604.14 mi (7,409.65 km) |
| Porsgrunn to Boone (Iowa) | 4,212.46 mi (6,779.30 km) |
| Porsgrunn to Boone (North Carolina) | 4,159.10 mi (6,693.43 km) |
| Porsgrunn to Borger (Texas) | 4,802.47 mi (7,728.83 km) |
| Porsgrunn to Bossier City (Louisiana) | 4,755.15 mi (7,652.68 km) |
| Porsgrunn to Boston (Massachusetts) | 3,476.75 mi (5,595.29 km) |
| Porsgrunn to Bostonia (California) | 5,390.60 mi (8,675.33 km) |
| Porsgrunn to Bothell (Washington) | 4,567.48 mi (7,350.66 km) |
| Porsgrunn to Bothell East (Washington) | 4,565.03 mi (7,346.71 km) |
| Porsgrunn to Bothell West (Washington) | 4,566.16 mi (7,348.53 km) |
| Porsgrunn to Boulder (Colorado) | 4,649.40 mi (7,482.48 km) |
| Porsgrunn to Boulder City (Nevada) | 5,152.51 mi (8,292.16 km) |
| Porsgrunn to Bound Brook (New Jersey) | 3,684.74 mi (5,930.01 km) |
