| Prospect Heights to Oliveira de Frades | 3,971.95 mi (6,392.24 km) |
| Prospect Heights to Oliveira do Bairro | 3,964.48 mi (6,380.22 km) |
| Prospect Heights to Oliveira do Hospital | 3,998.94 mi (6,435.68 km) |
| Prospect Heights to Ourem | 3,991.59 mi (6,423.85 km) |
| Prospect Heights to Ovar | 3,946.38 mi (6,351.08 km) |
| Prospect Heights to Pacos de Ferreira | 3,943.24 mi (6,346.04 km) |
| Prospect Heights to Palmela | 4,014.43 mi (6,460.59 km) |
| Prospect Heights to Paredes | 3,948.54 mi (6,354.56 km) |
| Prospect Heights to Paredes de Coura | 3,914.02 mi (6,299.01 km) |
| Prospect Heights to Penacova | 3,982.88 mi (6,409.83 km) |
| Prospect Heights to Penafiel | 3,950.56 mi (6,357.81 km) |
| Prospect Heights to Peniche | 3,965.28 mi (6,381.51 km) |
| Prospect Heights to Peso da Regua | 3,974.85 mi (6,396.91 km) |
| Prospect Heights to Pinhal Novo | 4,011.50 mi (6,455.88 km) |
| Prospect Heights to Pinhel | 4,020.13 mi (6,469.77 km) |
