| Muscle Shoals to Montalegre | 4,200.16 mi (6,759.50 km) |
| Muscle Shoals to Montemor-o-Novo | 4,264.39 mi (6,862.87 km) |
| Muscle Shoals to Montemor-o-Velho | 4,200.53 mi (6,760.10 km) |
| Muscle Shoals to Montijo | 4,229.62 mi (6,806.92 km) |
| Muscle Shoals to Mortagua | 4,215.38 mi (6,783.99 km) |
| Muscle Shoals to Moura | 4,316.78 mi (6,947.18 km) |
| Muscle Shoals to Murtosa | 4,188.07 mi (6,740.05 km) |
| Muscle Shoals to Nazare | 4,196.77 mi (6,754.05 km) |
| Muscle Shoals to Nelas | 4,231.75 mi (6,810.34 km) |
| Muscle Shoals to Obidos | 4,198.72 mi (6,757.19 km) |
| Muscle Shoals to Odemira | 4,273.20 mi (6,877.06 km) |
| Muscle Shoals to Odivelas | 4,212.86 mi (6,779.94 km) |
| Muscle Shoals to Oeiras | 4,208.94 mi (6,773.64 km) |
| Muscle Shoals to Olhao | 4,328.68 mi (6,966.34 km) |
| Muscle Shoals to Oliveira de Azemeis | 4,192.95 mi (6,747.90 km) |
