| Mountain Ash to Bougival | 311.71 mi (501.65 km) |
| Mountain Ash to Bouguenais | 321.03 mi (516.65 km) |
| Mountain Ash to Boulogne-Billancourt | 316.56 mi (509.45 km) |
| Mountain Ash to Boulogne-sur-Mer | 225.98 mi (363.68 km) |
| Mountain Ash to Bourg-de-Peage | 599.59 mi (964.94 km) |
| Mountain Ash to Bourg-en-Bresse | 543.14 mi (874.10 km) |
| Mountain Ash to Bourg-la-Reine | 321.62 mi (517.60 km) |
| Mountain Ash to Bourg-les-Valence | 600.08 mi (965.74 km) |
| Mountain Ash to Bourges | 410.07 mi (659.94 km) |
| Mountain Ash to Bourgoin-Jallieu | 576.70 mi (928.11 km) |
| Mountain Ash to Bressuire | 358.93 mi (577.64 km) |
| Mountain Ash to Brest | 232.69 mi (374.47 km) |
| Mountain Ash to Bretigny-sur-Orge | 329.01 mi (529.48 km) |
| Mountain Ash to Breuillet | 326.62 mi (525.65 km) |
| Mountain Ash to Briancon | 655.96 mi (1,055.66 km) |
