| Mason City to Oliveira de Frades | 4,172.26 mi (6,714.61 km) |
| Mason City to Oliveira do Bairro | 4,165.95 mi (6,704.45 km) |
| Mason City to Oliveira do Hospital | 4,199.94 mi (6,759.15 km) |
| Mason City to Ourem | 4,196.00 mi (6,752.81 km) |
| Mason City to Ovar | 4,146.89 mi (6,673.77 km) |
| Mason City to Pacos de Ferreira | 4,142.04 mi (6,665.98 km) |
| Mason City to Palmela | 4,222.80 mi (6,795.94 km) |
| Mason City to Paredes | 4,147.46 mi (6,674.69 km) |
| Mason City to Paredes de Coura | 4,110.86 mi (6,615.79 km) |
| Mason City to Penacova | 4,184.83 mi (6,734.83 km) |
| Mason City to Penafiel | 4,149.38 mi (6,677.79 km) |
| Mason City to Peniche | 4,171.90 mi (6,714.03 km) |
| Mason City to Peso da Regua | 4,173.03 mi (6,715.84 km) |
| Mason City to Pinhal Novo | 4,219.69 mi (6,790.94 km) |
| Mason City to Pinhel | 4,218.46 mi (6,788.96 km) |
