| Guyancourt to Montemor-o-Novo | 866.18 mi (1,393.99 km) |
| Guyancourt to Montemor-o-Velho | 795.19 mi (1,279.73 km) |
| Guyancourt to Montijo | 884.71 mi (1,423.80 km) |
| Guyancourt to Mortagua | 766.08 mi (1,232.89 km) |
| Guyancourt to Moura | 875.09 mi (1,408.32 km) |
| Guyancourt to Murtosa | 763.07 mi (1,228.04 km) |
| Guyancourt to Nazare | 838.61 mi (1,349.60 km) |
| Guyancourt to Nelas | 749.25 mi (1,205.80 km) |
| Guyancourt to Obidos | 854.87 mi (1,375.78 km) |
| Guyancourt to Odemira | 940.66 mi (1,513.84 km) |
| Guyancourt to Odivelas | 887.27 mi (1,427.93 km) |
| Guyancourt to Oeiras | 897.58 mi (1,444.51 km) |
| Guyancourt to Olhao | 952.34 mi (1,532.65 km) |
| Guyancourt to Oliveira de Azemeis | 752.10 mi (1,210.40 km) |
| Guyancourt to Oliveira de Frades | 749.07 mi (1,205.52 km) |
