| Karlovy Vary to Oria | 710.55 mi (1,143.52 km) |
| Karlovy Vary to Oristano | 743.01 mi (1,195.75 km) |
| Karlovy Vary to Orta Nova | 629.82 mi (1,013.60 km) |
| Karlovy Vary to Orte | 537.37 mi (864.82 km) |
| Karlovy Vary to Ortona | 549.33 mi (884.05 km) |
| Karlovy Vary to Orvieto | 520.31 mi (837.35 km) |
| Karlovy Vary to Orzinuovi | 360.47 mi (580.13 km) |
| Karlovy Vary to Osimo | 467.08 mi (751.69 km) |
| Karlovy Vary to Ospitaletto | 348.03 mi (560.09 km) |
| Karlovy Vary to Ostuni | 694.39 mi (1,117.51 km) |
| Karlovy Vary to Ottaviano | 652.73 mi (1,050.47 km) |
| Karlovy Vary to Ovada | 433.72 mi (698.00 km) |
| Karlovy Vary to Ozieri | 692.13 mi (1,113.87 km) |
| Karlovy Vary to Paceco | 846.36 mi (1,362.08 km) |
| Karlovy Vary to Pachino | 940.26 mi (1,513.20 km) |
