| Merthyr Tudful to Brie-Comte-Robert | 338.24 mi (544.35 km) |
| Merthyr Tudful to Brignais | 559.07 mi (899.74 km) |
| Merthyr Tudful to Brignoles | 723.62 mi (1,164.55 km) |
| Merthyr Tudful to Brive-la-Gaillarde | 507.28 mi (816.39 km) |
| Merthyr Tudful to Bron | 560.38 mi (901.85 km) |
| Merthyr Tudful to Bruay-sur-l'Escaut | 314.22 mi (505.69 km) |
| Merthyr Tudful to Bruges | 490.64 mi (789.60 km) |
| Merthyr Tudful to Brumath | 531.58 mi (855.50 km) |
| Merthyr Tudful to Brunoy | 334.32 mi (538.04 km) |
| Merthyr Tudful to Bruz | 266.97 mi (429.65 km) |
| Merthyr Tudful to Bry-sur-Marne | 328.51 mi (528.69 km) |
| Merthyr Tudful to Bully-les-Mines | 279.56 mi (449.90 km) |
| Merthyr Tudful to Bures-sur-Yvette | 322.75 mi (519.42 km) |
| Merthyr Tudful to Bussy-Saint-Georges | 334.65 mi (538.56 km) |
| Merthyr Tudful to Buxerolles | 393.25 mi (632.87 km) |
