| Cayey to Opwijk | 4,402.28 mi (7,084.79 km) |
| Cayey to Ostend | 4,348.80 mi (6,998.71 km) |
| Cayey to Oud-Heverlee | 4,422.81 mi (7,117.83 km) |
| Cayey to Oud-Turnhout | 4,438.23 mi (7,142.64 km) |
| Cayey to Oudenaarde | 4,376.42 mi (7,043.16 km) |
| Cayey to Oudenburg | 4,352.05 mi (7,003.94 km) |
| Cayey to Oupeye | 4,465.06 mi (7,185.82 km) |
| Cayey to Overijse | 4,416.82 mi (7,108.18 km) |
| Cayey to Overpelt | 4,456.62 mi (7,172.24 km) |
| Cayey to Paal | 4,445.51 mi (7,154.35 km) |
| Cayey to Peer | 4,457.97 mi (7,174.40 km) |
| Cayey to Pepinster | 4,472.33 mi (7,197.51 km) |
| Cayey to Peruwelz | 4,374.21 mi (7,039.61 km) |
| Cayey to Perwez | 4,428.58 mi (7,127.12 km) |
| Cayey to Philippeville | 4,415.55 mi (7,106.15 km) |
