| Rockford to Montalegre | 3,997.09 mi (6,432.70 km) |
| Rockford to Montemor-o-Novo | 4,090.74 mi (6,583.41 km) |
| Rockford to Montemor-o-Velho | 4,015.09 mi (6,461.67 km) |
| Rockford to Montijo | 4,058.13 mi (6,530.93 km) |
| Rockford to Mortagua | 4,026.05 mi (6,479.29 km) |
| Rockford to Moura | 4,144.87 mi (6,670.52 km) |
| Rockford to Murtosa | 3,997.42 mi (6,433.23 km) |
| Rockford to Nazare | 4,017.70 mi (6,465.87 km) |
| Rockford to Nelas | 4,040.39 mi (6,502.37 km) |
| Rockford to Obidos | 4,022.13 mi (6,472.99 km) |
| Rockford to Odemira | 4,110.48 mi (6,615.17 km) |
| Rockford to Odivelas | 4,041.41 mi (6,504.02 km) |
| Rockford to Oeiras | 4,038.94 mi (6,500.05 km) |
| Rockford to Olhao | 4,167.87 mi (6,707.54 km) |
| Rockford to Oliveira de Azemeis | 4,000.82 mi (6,438.70 km) |
