| Omagh to Oliveira de Frades | 959.43 mi (1,544.06 km) |
| Omagh to Oliveira do Bairro | 973.97 mi (1,567.45 km) |
| Omagh to Oliveira do Hospital | 983.63 mi (1,583.00 km) |
| Omagh to Ourem | 1,033.95 mi (1,663.99 km) |
| Omagh to Ovar | 950.20 mi (1,529.19 km) |
| Omagh to Pacos de Ferreira | 921.95 mi (1,483.74 km) |
| Omagh to Palmela | 1,109.66 mi (1,785.83 km) |
| Omagh to Paredes | 926.39 mi (1,490.89 km) |
| Omagh to Paredes de Coura | 877.83 mi (1,412.73 km) |
| Omagh to Penacova | 990.44 mi (1,593.96 km) |
| Omagh to Penafiel | 925.87 mi (1,490.04 km) |
| Omagh to Peniche | 1,057.40 mi (1,701.73 km) |
| Omagh to Peso da Regua | 927.82 mi (1,493.19 km) |
| Omagh to Pinhal Novo | 1,105.27 mi (1,778.77 km) |
| Omagh to Pinhel | 954.01 mi (1,535.32 km) |
