| Castel Gandolfo to Bitonto | 213.30 mi (343.28 km) |
| Castel Gandolfo to Bitritto | 221.98 mi (357.24 km) |
| Castel Gandolfo to Bollate | 316.60 mi (509.52 km) |
| Castel Gandolfo to Bologna | 200.95 mi (323.39 km) |
| Castel Gandolfo to Bolzano | 334.51 mi (538.34 km) |
| Castel Gandolfo to Bomporto | 221.83 mi (357.00 km) |
| Castel Gandolfo to Bonate di Sopra | 312.53 mi (502.96 km) |
| Castel Gandolfo to Bondeno | 225.42 mi (362.77 km) |
| Castel Gandolfo to Bordighera | 289.31 mi (465.59 km) |
| Castel Gandolfo to Borgaro Torinese | 343.73 mi (553.18 km) |
| Castel Gandolfo to Borgo a Buggiano | 176.75 mi (284.45 km) |
| Castel Gandolfo to Borgo San Dalmazzo | 316.22 mi (508.91 km) |
| Castel Gandolfo to Borgo San Lorenzo | 165.22 mi (265.90 km) |
| Castel Gandolfo to Borgomanero | 343.80 mi (553.29 km) |
| Castel Gandolfo to Borgoricco | 262.71 mi (422.79 km) |
