| Nea Ionia to Montemor-o-Novo | 1,724.03 mi (2,774.56 km) |
| Nea Ionia to Montemor-o-Velho | 1,735.63 mi (2,793.23 km) |
| Nea Ionia to Montijo | 1,760.11 mi (2,832.62 km) |
| Nea Ionia to Mortagua | 1,710.32 mi (2,752.50 km) |
| Nea Ionia to Moura | 1,688.69 mi (2,717.69 km) |
| Nea Ionia to Murtosa | 1,729.55 mi (2,783.45 km) |
| Nea Ionia to Nazare | 1,760.17 mi (2,832.73 km) |
| Nea Ionia to Nelas | 1,689.77 mi (2,719.42 km) |
| Nea Ionia to Obidos | 1,767.12 mi (2,843.91 km) |
| Nea Ionia to Odemira | 1,759.00 mi (2,830.84 km) |
| Nea Ionia to Odivelas | 1,773.87 mi (2,854.76 km) |
| Nea Ionia to Oeiras | 1,782.31 mi (2,868.35 km) |
| Nea Ionia to Olhao | 1,724.05 mi (2,774.58 km) |
| Nea Ionia to Oliveira de Azemeis | 1,720.74 mi (2,769.27 km) |
| Nea Ionia to Oliveira de Frades | 1,706.15 mi (2,745.78 km) |
