| Atherton to Montalegre | 844.52 mi (1,359.12 km) |
| Atherton to Montemor-o-Novo | 1,062.72 mi (1,710.28 km) |
| Atherton to Montemor-o-Velho | 967.15 mi (1,556.48 km) |
| Atherton to Montijo | 1,069.18 mi (1,720.68 km) |
| Atherton to Mortagua | 943.23 mi (1,517.98 km) |
| Atherton to Moura | 1,089.09 mi (1,752.72 km) |
| Atherton to Murtosa | 928.74 mi (1,494.66 km) |
| Atherton to Nazare | 1,010.32 mi (1,625.95 km) |
| Atherton to Nelas | 932.71 mi (1,501.05 km) |
| Atherton to Obidos | 1,027.72 mi (1,653.96 km) |
| Atherton to Odemira | 1,139.62 mi (1,834.03 km) |
| Atherton to Odivelas | 1,065.87 mi (1,715.35 km) |
| Atherton to Oeiras | 1,074.93 mi (1,729.94 km) |
| Atherton to Olhao | 1,168.27 mi (1,880.15 km) |
| Atherton to Oliveira de Azemeis | 919.40 mi (1,479.63 km) |
