| South Portland to Ayr | 2,935.08 mi (4,723.56 km) |
| South Portland to Bacup | 3,059.07 mi (4,923.10 km) |
| South Portland to Baguley | 3,061.84 mi (4,927.55 km) |
| South Portland to Baildon | 3,073.40 mi (4,946.16 km) |
| South Portland to Bailleston | 2,948.88 mi (4,745.76 km) |
| South Portland to Balderton | 3,128.23 mi (5,034.40 km) |
| South Portland to Baldock | 3,174.33 mi (5,108.59 km) |
| South Portland to Balham | 3,188.14 mi (5,130.81 km) |
| South Portland to Bamber Bridge | 3,040.45 mi (4,893.13 km) |
| South Portland to Banbridge | 2,888.47 mi (4,648.55 km) |
| South Portland to Banbury | 3,126.54 mi (5,031.69 km) |
| South Portland to Bangor | 2,906.81 mi (4,678.06 km) |
| South Portland to Bangor | 2,991.39 mi (4,814.17 km) |
| South Portland to Banstead | 3,188.81 mi (5,131.90 km) |
| South Portland to Bargoed | 3,056.87 mi (4,919.55 km) |
