| Formia to Montemor-o-Novo | 1,167.18 mi (1,878.40 km) |
| Formia to Montemor-o-Velho | 1,167.08 mi (1,878.24 km) |
| Formia to Montijo | 1,202.03 mi (1,934.48 km) |
| Formia to Mortagua | 1,140.40 mi (1,835.30 km) |
| Formia to Moura | 1,137.68 mi (1,830.92 km) |
| Formia to Murtosa | 1,157.65 mi (1,863.05 km) |
| Formia to Nazare | 1,195.07 mi (1,923.28 km) |
| Formia to Nelas | 1,119.57 mi (1,801.77 km) |
| Formia to Obidos | 1,203.62 mi (1,937.05 km) |
| Formia to Odemira | 1,210.91 mi (1,948.77 km) |
| Formia to Odivelas | 1,214.58 mi (1,954.67 km) |
| Formia to Oeiras | 1,223.67 mi (1,969.30 km) |
| Formia to Olhao | 1,183.17 mi (1,904.12 km) |
| Formia to Oliveira de Azemeis | 1,148.32 mi (1,848.04 km) |
| Formia to Oliveira de Frades | 1,134.56 mi (1,825.90 km) |
