| Idar-Oberstein to Montemor-o-Novo | 1,080.47 mi (1,738.84 km) |
| Idar-Oberstein to Montemor-o-Velho | 1,019.48 mi (1,640.70 km) |
| Idar-Oberstein to Montijo | 1,102.66 mi (1,774.56 km) |
| Idar-Oberstein to Mortagua | 989.73 mi (1,592.82 km) |
| Idar-Oberstein to Moura | 1,082.29 mi (1,741.77 km) |
| Idar-Oberstein to Murtosa | 990.00 mi (1,593.26 km) |
| Idar-Oberstein to Nazare | 1,061.79 mi (1,708.78 km) |
| Idar-Oberstein to Nelas | 971.54 mi (1,563.54 km) |
| Idar-Oberstein to Obidos | 1,077.29 mi (1,733.73 km) |
| Idar-Oberstein to Odemira | 1,151.95 mi (1,853.88 km) |
| Idar-Oberstein to Odivelas | 1,107.08 mi (1,781.67 km) |
| Idar-Oberstein to Oeiras | 1,117.51 mi (1,798.45 km) |
| Idar-Oberstein to Olhao | 1,156.39 mi (1,861.03 km) |
| Idar-Oberstein to Oliveira de Azemeis | 978.93 mi (1,575.43 km) |
| Idar-Oberstein to Oliveira de Frades | 973.99 mi (1,567.49 km) |
