| Opatija to Olivenza | 1,186.21 mi (1,909.02 km) |
| Opatija to Olot | 627.61 mi (1,010.04 km) |
| Opatija to Onate | 841.77 mi (1,354.69 km) |
| Opatija to Onda | 826.28 mi (1,329.76 km) |
| Opatija to Onteniente | 884.98 mi (1,424.23 km) |
| Opatija to Orihuela | 929.97 mi (1,496.64 km) |
| Opatija to Osuna | 1,148.02 mi (1,847.55 km) |
| Opatija to Ourense | 1,120.12 mi (1,802.65 km) |
| Opatija to Oviedo | 1,001.98 mi (1,612.53 km) |
| Opatija to Paiporta | 853.01 mi (1,372.78 km) |
| Opatija to Pajara | 1,943.16 mi (3,127.21 km) |
| Opatija to Palafolls | 631.01 mi (1,015.51 km) |
| Opatija to Palafrugell | 604.28 mi (972.49 km) |
| Opatija to Palamos | 608.09 mi (978.62 km) |
| Opatija to Palencia | 966.20 mi (1,554.95 km) |
