| Killarney to Olivenza | 931.20 mi (1,498.62 km) |
| Killarney to Olot | 882.96 mi (1,420.99 km) |
| Killarney to Onate | 705.07 mi (1,134.69 km) |
| Killarney to Onda | 944.43 mi (1,519.91 km) |
| Killarney to Onteniente | 1,009.45 mi (1,624.56 km) |
| Killarney to Orihuela | 1,050.20 mi (1,690.14 km) |
| Killarney to Osuna | 1,046.50 mi (1,684.18 km) |
| Killarney to Ourense | 676.12 mi (1,088.12 km) |
| Killarney to Oviedo | 624.47 mi (1,004.99 km) |
| Killarney to Paiporta | 974.81 mi (1,568.80 km) |
| Killarney to Pajara | 1,655.14 mi (2,663.69 km) |
| Killarney to Palafolls | 919.72 mi (1,480.15 km) |
| Killarney to Palafrugell | 917.98 mi (1,477.34 km) |
| Killarney to Palamos | 920.96 mi (1,482.14 km) |
| Killarney to Palencia | 731.86 mi (1,177.82 km) |
