| Shannon to Oliveira do Bairro | 842.91 mi (1,356.53 km) |
| Shannon to Oliveira do Hospital | 854.95 mi (1,375.91 km) |
| Shannon to Ourem | 902.73 mi (1,452.80 km) |
| Shannon to Ovar | 818.62 mi (1,317.45 km) |
| Shannon to Pacos de Ferreira | 791.21 mi (1,273.34 km) |
| Shannon to Palmela | 977.46 mi (1,573.08 km) |
| Shannon to Paredes | 795.91 mi (1,280.90 km) |
| Shannon to Paredes de Coura | 746.41 mi (1,201.24 km) |
| Shannon to Penacova | 860.18 mi (1,384.32 km) |
| Shannon to Penafiel | 795.58 mi (1,280.36 km) |
| Shannon to Peniche | 923.65 mi (1,486.46 km) |
| Shannon to Peso da Regua | 799.55 mi (1,286.76 km) |
| Shannon to Pinhal Novo | 973.02 mi (1,565.93 km) |
| Shannon to Pinhel | 828.64 mi (1,333.57 km) |
| Shannon to Pombal | 884.30 mi (1,423.15 km) |
