| South Portland to Bradford | 3,074.88 mi (4,948.55 km) |
| South Portland to Bradford-on-Avon | 3,104.57 mi (4,996.33 km) |
| South Portland to Bradwell | 3,148.94 mi (5,067.74 km) |
| South Portland to Braintree | 3,206.66 mi (5,160.61 km) |
| South Portland to Bramhall | 3,067.08 mi (4,935.99 km) |
| South Portland to Brandon | 3,196.80 mi (5,144.74 km) |
| South Portland to Braunstone | 3,121.32 mi (5,023.27 km) |
| South Portland to Bredbury | 3,067.88 mi (4,937.28 km) |
| South Portland to Brentwood | 3,202.66 mi (5,154.19 km) |
| South Portland to Bridgnorth | 3,073.06 mi (4,945.61 km) |
| South Portland to Bridgwater | 3,078.72 mi (4,954.73 km) |
| South Portland to Bridlington | 3,130.15 mi (5,037.49 km) |
| South Portland to Bridport | 3,096.92 mi (4,984.01 km) |
| South Portland to Brierley Hill | 3,086.04 mi (4,966.50 km) |
| South Portland to Brighouse | 3,074.94 mi (4,948.63 km) |
