| Katy to Opwijk | 5,050.12 mi (8,127.39 km) |
| Katy to Ostend | 4,993.02 mi (8,035.49 km) |
| Katy to Oud-Heverlee | 5,073.08 mi (8,164.33 km) |
| Katy to Oud-Turnhout | 5,070.08 mi (8,159.50 km) |
| Katy to Oudenaarde | 5,030.99 mi (8,096.60 km) |
| Katy to Oudenburg | 4,997.44 mi (8,042.60 km) |
| Katy to Oupeye | 5,114.92 mi (8,231.68 km) |
| Katy to Overijse | 5,069.46 mi (8,158.51 km) |
| Katy to Overpelt | 5,089.90 mi (8,191.40 km) |
| Katy to Paal | 5,086.16 mi (8,185.39 km) |
| Katy to Peer | 5,093.99 mi (8,197.99 km) |
| Katy to Pepinster | 5,126.22 mi (8,249.86 km) |
| Katy to Peruwelz | 5,040.57 mi (8,112.01 km) |
| Katy to Perwez | 5,085.45 mi (8,184.24 km) |
| Katy to Philippeville | 5,088.47 mi (8,189.10 km) |
