| West Chicago to Montalegre | 3,972.00 mi (6,392.31 km) |
| West Chicago to Montemor-o-Novo | 4,063.13 mi (6,538.98 km) |
| West Chicago to Montemor-o-Velho | 3,988.44 mi (6,418.78 km) |
| West Chicago to Montijo | 4,030.32 mi (6,486.17 km) |
| West Chicago to Mortagua | 3,999.75 mi (6,436.97 km) |
| West Chicago to Moura | 4,117.16 mi (6,625.93 km) |
| West Chicago to Murtosa | 3,971.22 mi (6,391.06 km) |
| West Chicago to Nazare | 3,990.50 mi (6,422.09 km) |
| West Chicago to Nelas | 4,014.28 mi (6,460.36 km) |
| West Chicago to Obidos | 3,994.72 mi (6,428.88 km) |
| West Chicago to Odemira | 4,081.97 mi (6,569.29 km) |
| West Chicago to Odivelas | 4,013.58 mi (6,459.23 km) |
| West Chicago to Oeiras | 4,010.99 mi (6,455.06 km) |
| West Chicago to Olhao | 4,139.25 mi (6,661.48 km) |
| West Chicago to Oliveira de Azemeis | 3,974.75 mi (6,396.74 km) |
