| Omaha to Montalegre | 4,340.47 mi (6,985.31 km) |
| Omaha to Montemor-o-Novo | 4,440.89 mi (7,146.92 km) |
| Omaha to Montemor-o-Velho | 4,362.80 mi (7,021.24 km) |
| Omaha to Montijo | 4,408.84 mi (7,095.33 km) |
| Omaha to Mortagua | 4,372.79 mi (7,037.32 km) |
| Omaha to Moura | 4,495.25 mi (7,234.40 km) |
| Omaha to Murtosa | 4,343.94 mi (6,990.89 km) |
| Omaha to Nazare | 4,366.86 mi (7,027.78 km) |
| Omaha to Nelas | 4,386.59 mi (7,059.54 km) |
| Omaha to Obidos | 4,371.83 mi (7,035.78 km) |
| Omaha to Odemira | 4,462.86 mi (7,182.28 km) |
| Omaha to Odivelas | 4,392.17 mi (7,068.52 km) |
| Omaha to Oeiras | 4,390.01 mi (7,065.04 km) |
| Omaha to Olhao | 4,520.49 mi (7,275.03 km) |
| Omaha to Oliveira de Azemeis | 4,346.97 mi (6,995.77 km) |
