| South Portland to Beyne-Heusay | 3,443.75 mi (5,542.19 km) |
| South Portland to Bierbeek | 3,402.34 mi (5,475.54 km) |
| South Portland to Bilzen | 3,431.61 mi (5,522.64 km) |
| South Portland to Binche | 3,389.56 mi (5,454.98 km) |
| South Portland to Bissegem | 3,340.12 mi (5,375.41 km) |
| South Portland to Blankenberge | 3,323.84 mi (5,349.21 km) |
| South Portland to Blegny | 3,445.74 mi (5,545.39 km) |
| South Portland to Bocholt | 3,425.91 mi (5,513.46 km) |
| South Portland to Boechout | 3,382.61 mi (5,443.79 km) |
| South Portland to Bonheiden | 3,387.67 mi (5,451.93 km) |
| South Portland to Boom | 3,379.67 mi (5,439.05 km) |
| South Portland to Boortmeerbeek | 3,390.33 mi (5,456.20 km) |
| South Portland to Borgerhout | 3,379.29 mi (5,438.45 km) |
| South Portland to Borgloon | 3,426.38 mi (5,514.23 km) |
| South Portland to Bornem | 3,373.87 mi (5,429.72 km) |
