| Swindon to Montalegre | 729.98 mi (1,174.80 km) |
| Swindon to Montemor-o-Novo | 944.70 mi (1,520.34 km) |
| Swindon to Montemor-o-Velho | 853.47 mi (1,373.53 km) |
| Swindon to Montijo | 953.90 mi (1,535.15 km) |
| Swindon to Mortagua | 828.04 mi (1,332.59 km) |
| Swindon to Moura | 967.64 mi (1,557.27 km) |
| Swindon to Murtosa | 815.95 mi (1,313.15 km) |
| Swindon to Nazare | 897.27 mi (1,444.01 km) |
| Swindon to Nelas | 815.97 mi (1,313.17 km) |
| Swindon to Obidos | 914.62 mi (1,471.94 km) |
| Swindon to Odemira | 1,021.80 mi (1,644.43 km) |
| Swindon to Odivelas | 951.89 mi (1,531.91 km) |
| Swindon to Oeiras | 961.34 mi (1,547.12 km) |
| Swindon to Olhao | 1,047.07 mi (1,685.10 km) |
| Swindon to Oliveira de Azemeis | 806.09 mi (1,297.27 km) |
