| Irmo to Oliveira de Frades | 3,917.23 mi (6,304.17 km) |
| Irmo to Oliveira do Bairro | 3,905.90 mi (6,285.94 km) |
| Irmo to Oliveira do Hospital | 3,941.15 mi (6,342.67 km) |
| Irmo to Ourem | 3,921.93 mi (6,311.73 km) |
| Irmo to Ovar | 3,891.62 mi (6,262.95 km) |
| Irmo to Pacos de Ferreira | 3,894.50 mi (6,267.59 km) |
| Irmo to Palmela | 3,929.90 mi (6,324.56 km) |
| Irmo to Paredes | 3,899.23 mi (6,275.21 km) |
| Irmo to Paredes de Coura | 3,872.78 mi (6,232.63 km) |
| Irmo to Penacova | 3,922.16 mi (6,312.11 km) |
| Irmo to Penafiel | 3,901.54 mi (6,278.92 km) |
| Irmo to Peniche | 3,888.36 mi (6,257.71 km) |
| Irmo to Peso da Regua | 3,927.47 mi (6,320.65 km) |
| Irmo to Pinhal Novo | 3,927.70 mi (6,321.02 km) |
| Irmo to Pinhel | 3,971.03 mi (6,390.76 km) |
