| Derry to Olivares | 1,215.61 mi (1,956.33 km) |
| Derry to Olivenza | 1,126.68 mi (1,813.22 km) |
| Derry to Olot | 990.36 mi (1,593.83 km) |
| Derry to Onate | 855.32 mi (1,376.51 km) |
| Derry to Onda | 1,088.40 mi (1,751.61 km) |
| Derry to Onteniente | 1,160.24 mi (1,867.22 km) |
| Derry to Orihuela | 1,205.76 mi (1,940.48 km) |
| Derry to Osuna | 1,231.52 mi (1,981.93 km) |
| Derry to Ourense | 874.71 mi (1,407.72 km) |
| Derry to Oviedo | 806.46 mi (1,297.88 km) |
| Derry to Paiporta | 1,122.05 mi (1,805.76 km) |
| Derry to Pajara | 1,871.50 mi (3,011.88 km) |
| Derry to Palafolls | 1,028.24 mi (1,654.79 km) |
| Derry to Palafrugell | 1,021.04 mi (1,643.21 km) |
| Derry to Palamos | 1,024.84 mi (1,649.32 km) |
