| Karhula to Opwijk | 1,094.47 mi (1,761.39 km) |
| Karhula to Ostend | 1,120.62 mi (1,803.46 km) |
| Karhula to Oud-Heverlee | 1,086.53 mi (1,748.60 km) |
| Karhula to Oud-Turnhout | 1,052.94 mi (1,694.55 km) |
| Karhula to Oudenaarde | 1,117.99 mi (1,799.24 km) |
| Karhula to Oudenburg | 1,120.17 mi (1,802.74 km) |
| Karhula to Oupeye | 1,063.81 mi (1,712.03 km) |
| Karhula to Overijse | 1,093.04 mi (1,759.08 km) |
| Karhula to Overpelt | 1,044.86 mi (1,681.54 km) |
| Karhula to Paal | 1,061.04 mi (1,707.57 km) |
| Karhula to Peer | 1,047.95 mi (1,686.52 km) |
| Karhula to Pepinster | 1,065.98 mi (1,715.52 km) |
| Karhula to Peruwelz | 1,135.07 mi (1,826.71 km) |
| Karhula to Perwez | 1,092.63 mi (1,758.42 km) |
| Karhula to Philippeville | 1,122.13 mi (1,805.89 km) |
