| Karlovac to Obernburg am Main | 423.44 mi (681.46 km) |
| Karlovac to Obernkirchen | 551.85 mi (888.12 km) |
| Karlovac to Oberschleissheim | 268.16 mi (431.57 km) |
| Karlovac to Oberstdorf | 283.96 mi (456.99 km) |
| Karlovac to Obertraubling | 288.20 mi (463.81 km) |
| Karlovac to Obertshausen | 444.13 mi (714.77 km) |
| Karlovac to Oberursel | 458.88 mi (738.50 km) |
| Karlovac to Ochsenfurt | 384.80 mi (619.27 km) |
| Karlovac to Ochsenhausen | 319.65 mi (514.42 km) |
| Karlovac to Ochtrup | 599.38 mi (964.61 km) |
| Karlovac to Odenthal | 544.82 mi (876.80 km) |
| Karlovac to Oelde | 553.08 mi (890.10 km) |
| Karlovac to Oelsnitz | 375.00 mi (603.51 km) |
| Karlovac to Oer-Erkenschwick | 569.46 mi (916.45 km) |
| Karlovac to Oerlinghausen | 546.37 mi (879.29 km) |
