| Olbia to Oliveira do Bairro | 941.38 mi (1,515.01 km) |
| Olbia to Oliveira do Hospital | 909.65 mi (1,463.94 km) |
| Olbia to Ourem | 954.57 mi (1,536.23 km) |
| Olbia to Ovar | 945.42 mi (1,521.51 km) |
| Olbia to Pacos de Ferreira | 930.77 mi (1,497.92 km) |
| Olbia to Palmela | 989.04 mi (1,591.71 km) |
| Olbia to Paredes | 927.68 mi (1,492.95 km) |
| Olbia to Paredes de Coura | 936.70 mi (1,507.47 km) |
| Olbia to Penacova | 932.47 mi (1,500.67 km) |
| Olbia to Penafiel | 925.09 mi (1,488.79 km) |
| Olbia to Peniche | 1,000.53 mi (1,610.19 km) |
| Olbia to Peso da Regua | 899.01 mi (1,446.81 km) |
| Olbia to Pinhal Novo | 988.61 mi (1,591.01 km) |
| Olbia to Pinhel | 864.59 mi (1,391.43 km) |
| Olbia to Pombal | 954.41 mi (1,535.97 km) |
