| Kalkar to Montemor-o-Novo | 1,143.15 mi (1,839.73 km) |
| Kalkar to Montemor-o-Velho | 1,071.40 mi (1,724.24 km) |
| Kalkar to Montijo | 1,161.62 mi (1,869.45 km) |
| Kalkar to Mortagua | 1,042.45 mi (1,677.67 km) |
| Kalkar to Moura | 1,151.49 mi (1,853.14 km) |
| Kalkar to Murtosa | 1,038.68 mi (1,671.59 km) |
| Kalkar to Nazare | 1,114.97 mi (1,794.36 km) |
| Kalkar to Nelas | 1,025.86 mi (1,650.96 km) |
| Kalkar to Obidos | 1,131.34 mi (1,820.72 km) |
| Kalkar to Odemira | 1,217.52 mi (1,959.40 km) |
| Kalkar to Odivelas | 1,164.05 mi (1,873.36 km) |
| Kalkar to Oeiras | 1,174.33 mi (1,889.90 km) |
| Kalkar to Olhao | 1,228.36 mi (1,976.85 km) |
| Kalkar to Oliveira de Azemeis | 1,027.77 mi (1,654.04 km) |
| Kalkar to Oliveira de Frades | 1,025.22 mi (1,649.94 km) |
