| Formia to Azcoitia | 824.28 mi (1,326.55 km) |
| Formia to Azpeitia | 822.01 mi (1,322.90 km) |
| Formia to Azuqueca de Henares | 881.53 mi (1,418.69 km) |
| Formia to Badajoz | 1,098.48 mi (1,767.84 km) |
| Formia to Badalona | 590.12 mi (949.70 km) |
| Formia to Baena | 987.57 mi (1,589.34 km) |
| Formia to Baeza | 935.32 mi (1,505.25 km) |
| Formia to Bailen | 948.48 mi (1,526.43 km) |
| Formia to Balaguer | 663.03 mi (1,067.04 km) |
| Formia to Banolas | 562.51 mi (905.27 km) |
| Formia to Baranain | 790.34 mi (1,271.93 km) |
| Formia to Barbadanes | 1,108.22 mi (1,783.51 km) |
| Formia to Barbastro | 697.76 mi (1,122.93 km) |
| Formia to Barcelona | 593.21 mi (954.68 km) |
| Formia to Bargas | 928.07 mi (1,493.58 km) |
