| Castlebar to Beausoleil | 1,028.71 mi (1,655.55 km) |
| Castlebar to Beauvais | 575.48 mi (926.14 km) |
| Castlebar to Begles | 737.98 mi (1,187.66 km) |
| Castlebar to Belfort | 823.67 mi (1,325.57 km) |
| Castlebar to Bellegarde-sur-Valserine | 856.34 mi (1,378.15 km) |
| Castlebar to Bellerive-sur-Allier | 775.53 mi (1,248.09 km) |
| Castlebar to Bellevue | 609.46 mi (980.83 km) |
| Castlebar to Belley | 868.63 mi (1,397.92 km) |
| Castlebar to Berck-sur-Mer | 519.12 mi (835.44 km) |
| Castlebar to Bergerac | 760.92 mi (1,224.58 km) |
| Castlebar to Bernay | 537.83 mi (865.55 km) |
| Castlebar to Berre-l'Etang | 971.35 mi (1,563.23 km) |
| Castlebar to Besancon | 810.69 mi (1,304.67 km) |
| Castlebar to Bethune | 554.66 mi (892.63 km) |
| Castlebar to Betton | 513.81 mi (826.90 km) |
