| Kallithea to Opwijk | 1,309.69 mi (2,107.75 km) |
| Kallithea to Ostend | 1,364.89 mi (2,196.59 km) |
| Kallithea to Oud-Heverlee | 1,287.24 mi (2,071.62 km) |
| Kallithea to Oud-Turnhout | 1,296.53 mi (2,086.56 km) |
| Kallithea to Oudenaarde | 1,325.84 mi (2,133.73 km) |
| Kallithea to Oudenburg | 1,360.36 mi (2,189.29 km) |
| Kallithea to Oupeye | 1,248.03 mi (2,008.51 km) |
| Kallithea to Overijse | 1,289.90 mi (2,075.90 km) |
| Kallithea to Overpelt | 1,277.56 mi (2,056.03 km) |
| Kallithea to Paal | 1,278.26 mi (2,057.15 km) |
| Kallithea to Peer | 1,272.68 mi (2,048.19 km) |
| Kallithea to Pepinster | 1,236.01 mi (1,989.17 km) |
| Kallithea to Peruwelz | 1,313.55 mi (2,113.95 km) |
| Kallithea to Perwez | 1,273.46 mi (2,049.44 km) |
| Kallithea to Philippeville | 1,266.00 mi (2,037.42 km) |
