| Karlovac to Olivenza | 1,247.49 mi (2,007.65 km) |
| Karlovac to Olot | 688.82 mi (1,108.55 km) |
| Karlovac to Onate | 903.04 mi (1,453.30 km) |
| Karlovac to Onda | 886.66 mi (1,426.94 km) |
| Karlovac to Onteniente | 944.48 mi (1,520.00 km) |
| Karlovac to Orihuela | 988.93 mi (1,591.53 km) |
| Karlovac to Osuna | 1,208.21 mi (1,944.42 km) |
| Karlovac to Ourense | 1,181.14 mi (1,900.87 km) |
| Karlovac to Oviedo | 1,062.70 mi (1,710.24 km) |
| Karlovac to Paiporta | 912.99 mi (1,469.32 km) |
| Karlovac to Pajara | 2,001.98 mi (3,221.88 km) |
| Karlovac to Palafolls | 691.76 mi (1,113.29 km) |
| Karlovac to Palafrugell | 665.12 mi (1,070.40 km) |
| Karlovac to Palamos | 668.87 mi (1,076.44 km) |
| Karlovac to Palencia | 1,027.63 mi (1,653.81 km) |
