| Grantham to Montalegre | 835.48 mi (1,344.58 km) |
| Grantham to Montemor-o-Novo | 1,049.86 mi (1,689.59 km) |
| Grantham to Montemor-o-Velho | 958.98 mi (1,543.33 km) |
| Grantham to Montijo | 1,059.31 mi (1,704.80 km) |
| Grantham to Mortagua | 933.48 mi (1,502.30 km) |
| Grantham to Moura | 1,072.23 mi (1,725.59 km) |
| Grantham to Murtosa | 921.48 mi (1,482.98 km) |
| Grantham to Nazare | 1,002.79 mi (1,613.83 km) |
| Grantham to Nelas | 921.31 mi (1,482.71 km) |
| Grantham to Obidos | 1,020.14 mi (1,641.76 km) |
| Grantham to Odemira | 1,126.96 mi (1,813.67 km) |
| Grantham to Odivelas | 1,057.37 mi (1,701.67 km) |
| Grantham to Oeiras | 1,066.84 mi (1,716.91 km) |
| Grantham to Olhao | 1,151.68 mi (1,853.45 km) |
| Grantham to Oliveira de Azemeis | 911.61 mi (1,467.10 km) |
