| Porsgrunn to Buenaventura Lakes (Florida) | 4,593.90 mi (7,393.16 km) |
| Porsgrunn to Buffalo (Minnesota) | 4,035.84 mi (6,495.05 km) |
| Porsgrunn to Buffalo (New York) | 3,702.14 mi (5,958.02 km) |
| Porsgrunn to Buffalo Grove (Illinois) | 4,028.82 mi (6,483.76 km) |
| Porsgrunn to Buford (Georgia) | 4,353.03 mi (7,005.53 km) |
| Porsgrunn to Bull Run (Virginia) | 3,880.36 mi (6,244.84 km) |
| Porsgrunn to Bullhead City (Arizona) | 5,187.86 mi (8,349.05 km) |
| Porsgrunn to Burbank (California) | 5,337.76 mi (8,590.30 km) |
| Porsgrunn to Burbank (Illinois) | 4,046.35 mi (6,511.98 km) |
| Porsgrunn to Burien (Washington) | 4,588.78 mi (7,384.92 km) |
| Porsgrunn to Burkburnett (Texas) | 4,813.48 mi (7,746.55 km) |
| Porsgrunn to Burke (Virginia) | 3,871.97 mi (6,231.33 km) |
| Porsgrunn to Burke Centre (Virginia) | 3,872.48 mi (6,232.15 km) |
| Porsgrunn to Burleson (Texas) | 4,868.34 mi (7,834.84 km) |
| Porsgrunn to Burley (Idaho) | 4,711.83 mi (7,582.97 km) |
