| Omagh to Montalegre | 882.40 mi (1,420.09 km) |
| Omagh to Montemor-o-Novo | 1,102.20 mi (1,773.82 km) |
| Omagh to Montemor-o-Velho | 998.63 mi (1,607.14 km) |
| Omagh to Montijo | 1,101.62 mi (1,772.89 km) |
| Omagh to Mortagua | 979.10 mi (1,575.71 km) |
| Omagh to Moura | 1,137.07 mi (1,829.94 km) |
| Omagh to Murtosa | 959.40 mi (1,544.00 km) |
| Omagh to Nazare | 1,038.99 mi (1,672.09 km) |
| Omagh to Nelas | 972.71 mi (1,565.43 km) |
| Omagh to Obidos | 1,056.00 mi (1,699.47 km) |
| Omagh to Odemira | 1,176.76 mi (1,893.81 km) |
| Omagh to Odivelas | 1,095.22 mi (1,762.58 km) |
| Omagh to Oeiras | 1,103.13 mi (1,775.31 km) |
| Omagh to Olhao | 1,213.84 mi (1,953.48 km) |
| Omagh to Oliveira de Azemeis | 951.59 mi (1,531.44 km) |
