| Calera to Opwijk | 4,520.16 mi (7,274.50 km) |
| Calera to Ostend | 4,462.64 mi (7,181.93 km) |
| Calera to Oud-Heverlee | 4,543.15 mi (7,311.50 km) |
| Calera to Oud-Turnhout | 4,542.54 mi (7,310.51 km) |
| Calera to Oudenaarde | 4,499.85 mi (7,241.82 km) |
| Calera to Oudenburg | 4,466.98 mi (7,188.91 km) |
| Calera to Oupeye | 4,585.69 mi (7,379.96 km) |
| Calera to Overijse | 4,539.17 mi (7,305.09 km) |
| Calera to Overpelt | 4,562.48 mi (7,342.60 km) |
| Calera to Paal | 4,557.70 mi (7,334.92 km) |
| Calera to Peer | 4,566.27 mi (7,348.70 km) |
| Calera to Pepinster | 4,596.63 mi (7,397.57 km) |
| Calera to Peruwelz | 4,508.06 mi (7,255.02 km) |
| Calera to Perwez | 4,554.85 mi (7,330.32 km) |
| Calera to Philippeville | 4,555.84 mi (7,331.92 km) |
