| Karlovac to Oestrich-Winkel | 469.10 mi (754.95 km) |
| Karlovac to Offenburg | 413.76 mi (665.88 km) |
| Karlovac to Oftersheim | 421.77 mi (678.77 km) |
| Karlovac to Ohrdruf | 430.69 mi (693.12 km) |
| Karlovac to Ohringen | 382.12 mi (614.96 km) |
| Karlovac to Olbernhau | 372.43 mi (599.36 km) |
| Karlovac to Olching | 274.26 mi (441.38 km) |
| Karlovac to Oldenburg | 623.25 mi (1,003.02 km) |
| Karlovac to Oldenburg in Holstein | 643.26 mi (1,035.23 km) |
| Karlovac to Olfen | 569.15 mi (915.96 km) |
| Karlovac to Olpe | 521.19 mi (838.78 km) |
| Karlovac to Olsberg | 518.47 mi (834.39 km) |
| Karlovac to Oranienburg | 513.09 mi (825.73 km) |
| Karlovac to Ortenberg | 451.08 mi (725.94 km) |
| Karlovac to Oschatz | 417.19 mi (671.40 km) |
