| Karlovy Vary to Opwijk | 384.23 mi (618.36 km) |
| Karlovy Vary to Ostend | 440.35 mi (708.68 km) |
| Karlovy Vary to Oud-Heverlee | 362.60 mi (583.54 km) |
| Karlovy Vary to Oud-Turnhout | 352.59 mi (567.44 km) |
| Karlovy Vary to Oudenaarde | 409.14 mi (658.44 km) |
| Karlovy Vary to Oudenburg | 436.62 mi (702.68 km) |
| Karlovy Vary to Oupeye | 319.51 mi (514.20 km) |
| Karlovy Vary to Overijse | 368.23 mi (592.61 km) |
| Karlovy Vary to Overpelt | 333.00 mi (535.92 km) |
| Karlovy Vary to Paal | 341.85 mi (550.16 km) |
| Karlovy Vary to Peer | 330.57 mi (532.00 km) |
| Karlovy Vary to Pepinster | 311.51 mi (501.32 km) |
| Karlovy Vary to Peruwelz | 409.55 mi (659.10 km) |
| Karlovy Vary to Perwez | 355.53 mi (572.16 km) |
| Karlovy Vary to Philippeville | 367.78 mi (591.88 km) |
