| Tallaght to Olivenza | 1,009.57 mi (1,624.75 km) |
| Tallaght to Olot | 869.03 mi (1,398.57 km) |
| Tallaght to Onate | 731.18 mi (1,176.73 km) |
| Tallaght to Onda | 964.20 mi (1,551.73 km) |
| Tallaght to Onteniente | 1,036.01 mi (1,667.30 km) |
| Tallaght to Orihuela | 1,081.62 mi (1,740.69 km) |
| Tallaght to Osuna | 1,110.95 mi (1,787.91 km) |
| Tallaght to Ourense | 759.90 mi (1,222.94 km) |
| Tallaght to Oviedo | 686.40 mi (1,104.65 km) |
| Tallaght to Paiporta | 997.82 mi (1,605.83 km) |
| Tallaght to Pajara | 1,767.59 mi (2,844.66 km) |
| Tallaght to Palafolls | 906.85 mi (1,459.43 km) |
| Tallaght to Palafrugell | 900.43 mi (1,449.10 km) |
| Tallaght to Palamos | 904.11 mi (1,455.03 km) |
| Tallaght to Palencia | 783.36 mi (1,260.69 km) |
