| Chicago Heights to Oliveira de Frades | 3,977.87 mi (6,401.76 km) |
| Chicago Heights to Oliveira do Bairro | 3,970.14 mi (6,389.32 km) |
| Chicago Heights to Oliveira do Hospital | 4,004.69 mi (6,444.93 km) |
| Chicago Heights to Ourem | 3,996.55 mi (6,431.82 km) |
| Chicago Heights to Ovar | 3,952.26 mi (6,360.55 km) |
| Chicago Heights to Pacos de Ferreira | 3,949.52 mi (6,356.13 km) |
| Chicago Heights to Palmela | 4,018.43 mi (6,467.03 km) |
| Chicago Heights to Paredes | 3,954.78 mi (6,364.60 km) |
| Chicago Heights to Paredes de Coura | 3,920.75 mi (6,309.84 km) |
| Chicago Heights to Penacova | 3,988.41 mi (6,418.73 km) |
| Chicago Heights to Penafiel | 3,956.82 mi (6,367.89 km) |
| Chicago Heights to Peniche | 3,969.73 mi (6,388.66 km) |
| Chicago Heights to Peso da Regua | 3,981.25 mi (6,407.21 km) |
| Chicago Heights to Pinhal Novo | 4,015.54 mi (6,462.39 km) |
| Chicago Heights to Pinhel | 4,026.47 mi (6,479.98 km) |
