| Castel Gandolfo to Brescia | 288.80 mi (464.78 km) |
| Castel Gandolfo to Bressanone | 346.87 mi (558.23 km) |
| Castel Gandolfo to Bresso | 313.81 mi (505.03 km) |
| Castel Gandolfo to Brindisi | 285.13 mi (458.87 km) |
| Castel Gandolfo to Broni | 285.31 mi (459.15 km) |
| Castel Gandolfo to Bronte | 297.33 mi (478.50 km) |
| Castel Gandolfo to Brugherio | 311.61 mi (501.48 km) |
| Castel Gandolfo to Brugnera | 287.01 mi (461.90 km) |
| Castel Gandolfo to Bruino | 344.60 mi (554.58 km) |
| Castel Gandolfo to Brunico | 350.67 mi (564.35 km) |
| Castel Gandolfo to Brusciano | 108.04 mi (173.88 km) |
| Castel Gandolfo to Bucine | 131.01 mi (210.84 km) |
| Castel Gandolfo to Budrio | 201.71 mi (324.62 km) |
| Castel Gandolfo to Busca | 323.90 mi (521.27 km) |
| Castel Gandolfo to Bussolengo | 272.34 mi (438.30 km) |
