| Castelo Branco to Blackburn | 990.78 mi (1,594.50 km) |
| Castelo Branco to Blackpool | 989.26 mi (1,592.06 km) |
| Castelo Branco to Blairgowrie | 1,174.22 mi (1,889.72 km) |
| Castelo Branco to Blandford Forum | 805.01 mi (1,295.54 km) |
| Castelo Branco to Blaydon | 1,079.97 mi (1,738.04 km) |
| Castelo Branco to Bletchley | 901.13 mi (1,450.24 km) |
| Castelo Branco to Bloxwich | 921.74 mi (1,483.40 km) |
| Castelo Branco to Blunsdon Saint Andrew | 859.48 mi (1,383.19 km) |
| Castelo Branco to Blyth | 1,093.10 mi (1,759.17 km) |
| Castelo Branco to Bo'ness | 1,133.28 mi (1,823.83 km) |
| Castelo Branco to Bodmin | 748.04 mi (1,203.85 km) |
| Castelo Branco to Bognor Regis | 826.19 mi (1,329.62 km) |
| Castelo Branco to Bolsover | 971.80 mi (1,563.97 km) |
| Castelo Branco to Bolton | 980.08 mi (1,577.28 km) |
| Castelo Branco to Bonhill | 1,124.96 mi (1,810.45 km) |
