| Amarillo to Montalegre | 4,838.86 mi (7,787.39 km) |
| Amarillo to Montemor-o-Novo | 4,929.89 mi (7,933.90 km) |
| Amarillo to Montemor-o-Velho | 4,855.57 mi (7,814.29 km) |
| Amarillo to Montijo | 4,896.94 mi (7,880.87 km) |
| Amarillo to Mortagua | 4,866.90 mi (7,832.52 km) |
| Amarillo to Moura | 4,983.85 mi (8,020.73 km) |
| Amarillo to Murtosa | 4,838.37 mi (7,786.61 km) |
| Amarillo to Nazare | 4,857.47 mi (7,817.34 km) |
| Amarillo to Nelas | 4,881.43 mi (7,855.90 km) |
| Amarillo to Obidos | 4,861.59 mi (7,823.98 km) |
| Amarillo to Odemira | 4,947.99 mi (7,963.02 km) |
| Amarillo to Odivelas | 4,880.20 mi (7,853.92 km) |
| Amarillo to Oeiras | 4,877.51 mi (7,849.59 km) |
| Amarillo to Olhao | 5,005.14 mi (8,055.00 km) |
| Amarillo to Oliveira de Azemeis | 4,841.90 mi (7,792.28 km) |
