| Srem to Montemor-o-Novo | 1,523.71 mi (2,452.17 km) |
| Srem to Montemor-o-Velho | 1,468.44 mi (2,363.22 km) |
| Srem to Montijo | 1,547.91 mi (2,491.13 km) |
| Srem to Mortagua | 1,438.52 mi (2,315.07 km) |
| Srem to Moura | 1,521.03 mi (2,447.86 km) |
| Srem to Murtosa | 1,440.21 mi (2,317.80 km) |
| Srem to Nazare | 1,510.03 mi (2,430.16 km) |
| Srem to Nelas | 1,419.78 mi (2,284.91 km) |
| Srem to Obidos | 1,525.08 mi (2,454.39 km) |
| Srem to Odemira | 1,592.76 mi (2,563.30 km) |
| Srem to Odivelas | 1,553.34 mi (2,499.86 km) |
| Srem to Oeiras | 1,563.79 mi (2,516.68 km) |
| Srem to Olhao | 1,592.20 mi (2,562.41 km) |
| Srem to Oliveira de Azemeis | 1,429.12 mi (2,299.95 km) |
| Srem to Oliveira de Frades | 1,423.41 mi (2,290.76 km) |
