| Rockwall to Montalegre | 4,687.45 mi (7,543.72 km) |
| Rockwall to Montemor-o-Novo | 4,761.55 mi (7,662.97 km) |
| Rockwall to Montemor-o-Velho | 4,693.87 mi (7,554.06 km) |
| Rockwall to Montijo | 4,727.35 mi (7,607.94 km) |
| Rockwall to Mortagua | 4,707.47 mi (7,575.94 km) |
| Rockwall to Moura | 4,814.57 mi (7,748.30 km) |
| Rockwall to Murtosa | 4,679.67 mi (7,531.19 km) |
| Rockwall to Nazare | 4,692.13 mi (7,551.25 km) |
| Rockwall to Nelas | 4,723.20 mi (7,601.26 km) |
| Rockwall to Obidos | 4,694.85 mi (7,555.63 km) |
| Rockwall to Odemira | 4,773.53 mi (7,682.26 km) |
| Rockwall to Odivelas | 4,710.56 mi (7,580.92 km) |
| Rockwall to Oeiras | 4,707.06 mi (7,575.29 km) |
| Rockwall to Olhao | 4,829.65 mi (7,772.57 km) |
| Rockwall to Oliveira de Azemeis | 4,684.06 mi (7,538.26 km) |
