| River Forest to Montalegre | 3,953.83 mi (6,363.07 km) |
| River Forest to Montemor-o-Novo | 4,044.38 mi (6,508.80 km) |
| River Forest to Montemor-o-Velho | 3,969.91 mi (6,388.95 km) |
| River Forest to Montijo | 4,011.52 mi (6,455.91 km) |
| River Forest to Mortagua | 3,981.29 mi (6,407.27 km) |
| River Forest to Moura | 4,098.38 mi (6,595.70 km) |
| River Forest to Murtosa | 3,952.78 mi (6,361.39 km) |
| River Forest to Nazare | 3,971.84 mi (6,392.06 km) |
| River Forest to Nelas | 3,995.87 mi (6,430.72 km) |
| River Forest to Obidos | 3,976.01 mi (6,398.77 km) |
| River Forest to Odemira | 4,063.02 mi (6,538.79 km) |
| River Forest to Odivelas | 3,994.78 mi (6,428.97 km) |
| River Forest to Oeiras | 3,992.15 mi (6,424.75 km) |
| River Forest to Olhao | 4,120.27 mi (6,630.94 km) |
| River Forest to Oliveira de Azemeis | 3,956.35 mi (6,367.12 km) |
