| Galveston to Montalegre | 4,765.98 mi (7,670.10 km) |
| Galveston to Montemor-o-Novo | 4,825.30 mi (7,765.57 km) |
| Galveston to Montemor-o-Velho | 4,763.71 mi (7,666.45 km) |
| Galveston to Montijo | 4,790.20 mi (7,709.08 km) |
| Galveston to Mortagua | 4,779.16 mi (7,691.32 km) |
| Galveston to Moura | 4,877.22 mi (7,849.13 km) |
| Galveston to Murtosa | 4,752.12 mi (7,647.80 km) |
| Galveston to Nazare | 4,758.85 mi (7,658.63 km) |
| Galveston to Nelas | 4,795.83 mi (7,718.14 km) |
| Galveston to Obidos | 4,760.34 mi (7,661.03 km) |
| Galveston to Odemira | 4,831.86 mi (7,776.13 km) |
| Galveston to Odivelas | 4,773.47 mi (7,682.15 km) |
| Galveston to Oeiras | 4,769.28 mi (7,675.41 km) |
| Galveston to Olhao | 4,886.77 mi (7,864.50 km) |
| Galveston to Oliveira de Azemeis | 4,757.22 mi (7,656.00 km) |
