| Ironton to Montalegre | 3,829.89 mi (6,163.61 km) |
| Ironton to Montemor-o-Novo | 3,899.98 mi (6,276.41 km) |
| Ironton to Montemor-o-Velho | 3,833.56 mi (6,169.52 km) |
| Ironton to Montijo | 3,865.63 mi (6,221.13 km) |
| Ironton to Mortagua | 3,847.66 mi (6,192.21 km) |
| Ironton to Moura | 3,952.84 mi (6,361.49 km) |
| Ironton to Murtosa | 3,820.06 mi (6,147.79 km) |
| Ironton to Nazare | 3,831.09 mi (6,165.55 km) |
| Ironton to Nelas | 3,863.67 mi (6,217.97 km) |
| Ironton to Obidos | 3,833.57 mi (6,169.53 km) |
| Ironton to Odemira | 3,911.27 mi (6,294.58 km) |
| Ironton to Odivelas | 3,848.84 mi (6,194.11 km) |
| Ironton to Oeiras | 3,845.24 mi (6,188.31 km) |
| Ironton to Olhao | 3,967.30 mi (6,384.75 km) |
| Ironton to Oliveira de Azemeis | 3,824.66 mi (6,155.20 km) |
