| Nagykallo to Opwijk | 819.82 mi (1,319.37 km) |
| Nagykallo to Ostend | 876.62 mi (1,410.79 km) |
| Nagykallo to Oud-Heverlee | 797.66 mi (1,283.71 km) |
| Nagykallo to Oud-Turnhout | 789.61 mi (1,270.76 km) |
| Nagykallo to Oudenaarde | 843.95 mi (1,358.21 km) |
| Nagykallo to Oudenburg | 872.77 mi (1,404.58 km) |
| Nagykallo to Oupeye | 754.19 mi (1,213.76 km) |
| Nagykallo to Overijse | 802.95 mi (1,292.23 km) |
| Nagykallo to Overpelt | 769.91 mi (1,239.04 km) |
| Nagykallo to Paal | 778.10 mi (1,252.24 km) |
| Nagykallo to Peer | 767.25 mi (1,234.77 km) |
| Nagykallo to Pepinster | 745.23 mi (1,199.33 km) |
| Nagykallo to Peruwelz | 842.20 mi (1,355.39 km) |
| Nagykallo to Perwez | 789.30 mi (1,270.25 km) |
| Nagykallo to Philippeville | 797.79 mi (1,283.93 km) |
