| Castel Gandolfo to Blumberg | 466.68 mi (751.05 km) |
| Castel Gandolfo to Bobenheim-Roxheim | 579.52 mi (932.65 km) |
| Castel Gandolfo to Bobingen | 459.27 mi (739.12 km) |
| Castel Gandolfo to Boblingen | 510.89 mi (822.20 km) |
| Castel Gandolfo to Bocholt | 752.47 mi (1,210.99 km) |
| Castel Gandolfo to Bochum | 719.90 mi (1,158.57 km) |
| Castel Gandolfo to Bockenem | 719.03 mi (1,157.16 km) |
| Castel Gandolfo to Bockhorn | 833.18 mi (1,340.88 km) |
| Castel Gandolfo to Bogen | 495.39 mi (797.25 km) |
| Castel Gandolfo to Bohl-Iggelheim | 566.91 mi (912.36 km) |
| Castel Gandolfo to Bohmte | 761.25 mi (1,225.11 km) |
| Castel Gandolfo to Boizenburg | 807.83 mi (1,300.07 km) |
| Castel Gandolfo to Bonen | 718.71 mi (1,156.65 km) |
| Castel Gandolfo to Bonn | 674.73 mi (1,085.87 km) |
| Castel Gandolfo to Bopfingen | 503.74 mi (810.69 km) |
