| Idanha-a-Nova to Blackburn | 981.13 mi (1,578.97 km) |
| Idanha-a-Nova to Blackpool | 979.91 mi (1,577.01 km) |
| Idanha-a-Nova to Blairgowrie | 1,165.49 mi (1,875.68 km) |
| Idanha-a-Nova to Blandford Forum | 794.35 mi (1,278.39 km) |
| Idanha-a-Nova to Blaydon | 1,070.23 mi (1,722.37 km) |
| Idanha-a-Nova to Bletchley | 890.10 mi (1,432.47 km) |
| Idanha-a-Nova to Bloxwich | 911.55 mi (1,467.00 km) |
| Idanha-a-Nova to Blunsdon Saint Andrew | 848.86 mi (1,366.11 km) |
| Idanha-a-Nova to Blyth | 1,083.31 mi (1,743.42 km) |
| Idanha-a-Nova to Bo'ness | 1,124.58 mi (1,809.84 km) |
| Idanha-a-Nova to Bodmin | 738.99 mi (1,189.29 km) |
| Idanha-a-Nova to Bognor Regis | 814.67 mi (1,311.09 km) |
| Idanha-a-Nova to Bolsover | 961.43 mi (1,547.27 km) |
| Idanha-a-Nova to Bolton | 970.36 mi (1,561.64 km) |
| Idanha-a-Nova to Bonhill | 1,116.70 mi (1,797.15 km) |
