| Opfikon to Montalegre | 890.55 mi (1,433.20 km) |
| Opfikon to Montemor-o-Novo | 1,038.79 mi (1,671.77 km) |
| Opfikon to Montemor-o-Velho | 992.81 mi (1,597.77 km) |
| Opfikon to Montijo | 1,065.25 mi (1,714.35 km) |
| Opfikon to Mortagua | 962.80 mi (1,549.47 km) |
| Opfikon to Moura | 1,032.18 mi (1,661.13 km) |
| Opfikon to Murtosa | 968.10 mi (1,558.01 km) |
| Opfikon to Nazare | 1,032.52 mi (1,661.67 km) |
| Opfikon to Nelas | 943.09 mi (1,517.76 km) |
| Opfikon to Obidos | 1,046.58 mi (1,684.31 km) |
| Opfikon to Odemira | 1,105.15 mi (1,778.57 km) |
| Opfikon to Odivelas | 1,072.07 mi (1,725.33 km) |
| Opfikon to Oeiras | 1,082.47 mi (1,742.07 km) |
| Opfikon to Olhao | 1,101.27 mi (1,772.32 km) |
| Opfikon to Oliveira de Azemeis | 957.11 mi (1,540.32 km) |
