| Mountain Ash to Brownhills | 90.59 mi (145.80 km) |
| Mountain Ash to Broxbourne | 143.80 mi (231.42 km) |
| Mountain Ash to Broxburn | 293.85 mi (472.91 km) |
| Mountain Ash to Bryn | 129.19 mi (207.91 km) |
| Mountain Ash to Buckhurst Hill | 146.41 mi (235.63 km) |
| Mountain Ash to Buckie | 414.51 mi (667.10 km) |
| Mountain Ash to Buckingham | 104.44 mi (168.07 km) |
| Mountain Ash to Buckley | 103.73 mi (166.93 km) |
| Mountain Ash to Bucksburn | 382.77 mi (616.00 km) |
| Mountain Ash to Bude | 77.70 mi (125.05 km) |
| Mountain Ash to Bulwell | 129.60 mi (208.57 km) |
| Mountain Ash to Burbage | 104.15 mi (167.61 km) |
| Mountain Ash to Burgess Hill | 149.19 mi (240.10 km) |
| Mountain Ash to Burnham | 117.07 mi (188.41 km) |
| Mountain Ash to Burnham-on-Sea | 34.87 mi (56.12 km) |
