| Castlebar to Bingen am Rhein | 778.45 mi (1,252.79 km) |
| Castlebar to Birkenau | 823.30 mi (1,324.97 km) |
| Castlebar to Birkenfeld | 844.02 mi (1,358.32 km) |
| Castlebar to Bischofsheim | 795.83 mi (1,280.77 km) |
| Castlebar to Bischofswerda | 1,000.71 mi (1,610.49 km) |
| Castlebar to Bisingen | 875.29 mi (1,408.65 km) |
| Castlebar to Bissendorf | 732.18 mi (1,178.33 km) |
| Castlebar to Bitburg | 724.48 mi (1,165.94 km) |
| Castlebar to Bitterfeld | 913.72 mi (1,470.48 km) |
| Castlebar to Blankenburg | 854.74 mi (1,375.57 km) |
| Castlebar to Blankenfelde | 943.21 mi (1,517.95 km) |
| Castlebar to Blaubeuren | 905.27 mi (1,456.90 km) |
| Castlebar to Bleicherode | 846.90 mi (1,362.96 km) |
| Castlebar to Blieskastel | 777.23 mi (1,250.83 km) |
| Castlebar to Blomberg | 775.38 mi (1,247.85 km) |
