| Karlovac to Novi di Modena | 229.99 mi (370.13 km) |
| Karlovac to Novi Ligure | 333.45 mi (536.64 km) |
| Karlovac to Nuoro | 475.55 mi (765.33 km) |
| Karlovac to Occhiobello | 197.05 mi (317.12 km) |
| Karlovac to Oderzo | 149.12 mi (239.99 km) |
| Karlovac to Oggiono | 300.18 mi (483.10 km) |
| Karlovac to Olbia | 438.39 mi (705.52 km) |
| Karlovac to Oleggio | 334.71 mi (538.66 km) |
| Karlovac to Olgiate Comasco | 318.65 mi (512.81 km) |
| Karlovac to Olgiate Olona | 322.59 mi (519.17 km) |
| Karlovac to Omegna | 345.78 mi (556.47 km) |
| Karlovac to Opera | 307.07 mi (494.18 km) |
| Karlovac to Oppeano | 212.23 mi (341.55 km) |
| Karlovac to Orbassano | 391.03 mi (629.30 km) |
| Karlovac to Orbetello | 301.19 mi (484.72 km) |
