| Formia to Olivenza | 1,108.59 mi (1,784.11 km) |
| Formia to Olot | 576.89 mi (928.42 km) |
| Formia to Onate | 829.02 mi (1,334.18 km) |
| Formia to Onda | 732.78 mi (1,179.29 km) |
| Formia to Onteniente | 770.13 mi (1,239.40 km) |
| Formia to Orihuela | 803.94 mi (1,293.82 km) |
| Formia to Osuna | 1,037.17 mi (1,669.16 km) |
| Formia to Ourense | 1,105.87 mi (1,779.73 km) |
| Formia to Oviedo | 1,002.47 mi (1,613.32 km) |
| Formia to Paiporta | 749.04 mi (1,205.46 km) |
| Formia to Pajara | 1,796.42 mi (2,891.06 km) |
| Formia to Palafolls | 562.89 mi (905.88 km) |
| Formia to Palafrugell | 541.71 mi (871.80 km) |
| Formia to Palamos | 543.38 mi (874.49 km) |
| Formia to Palencia | 936.84 mi (1,507.69 km) |
