| Karlovy Vary to Navodari | 840.93 mi (1,353.35 km) |
| Karlovy Vary to Negresti-Oas | 504.38 mi (811.72 km) |
| Karlovy Vary to Nehoiu | 707.30 mi (1,138.29 km) |
| Karlovy Vary to Ocna Mures | 569.62 mi (916.71 km) |
| Karlovy Vary to Odobesti | 723.57 mi (1,164.47 km) |
| Karlovy Vary to Odorheiu Secuiesc | 631.37 mi (1,016.10 km) |
| Karlovy Vary to Oltenita | 771.68 mi (1,241.90 km) |
| Karlovy Vary to Onesti | 694.47 mi (1,117.64 km) |
| Karlovy Vary to Oradea | 466.70 mi (751.07 km) |
| Karlovy Vary to Orastie | 564.24 mi (908.05 km) |
| Karlovy Vary to Oravita | 544.28 mi (875.94 km) |
| Karlovy Vary to Orsova | 584.41 mi (940.52 km) |
| Karlovy Vary to Otelu Rosu | 546.15 mi (878.95 km) |
| Karlovy Vary to Otopeni | 729.94 mi (1,174.72 km) |
| Karlovy Vary to Ovidiu | 840.78 mi (1,353.10 km) |
