| Arnsberg to Montemor-o-Novo | 1,181.20 mi (1,900.95 km) |
| Arnsberg to Montemor-o-Velho | 1,114.62 mi (1,793.81 km) |
| Arnsberg to Montijo | 1,201.59 mi (1,933.77 km) |
| Arnsberg to Mortagua | 1,085.22 mi (1,746.50 km) |
| Arnsberg to Moura | 1,186.12 mi (1,908.88 km) |
| Arnsberg to Murtosa | 1,083.35 mi (1,743.48 km) |
| Arnsberg to Nazare | 1,157.67 mi (1,863.10 km) |
| Arnsberg to Nelas | 1,067.82 mi (1,718.49 km) |
| Arnsberg to Obidos | 1,173.66 mi (1,888.83 km) |
| Arnsberg to Odemira | 1,254.19 mi (2,018.42 km) |
| Arnsberg to Odivelas | 1,205.01 mi (1,939.27 km) |
| Arnsberg to Oeiras | 1,215.38 mi (1,955.97 km) |
| Arnsberg to Olhao | 1,261.61 mi (2,030.36 km) |
| Arnsberg to Oliveira de Azemeis | 1,072.34 mi (1,725.76 km) |
| Arnsberg to Oliveira de Frades | 1,068.66 mi (1,719.84 km) |
