| San Gregorio di Catania to Opwijk | 1,069.70 mi (1,721.51 km) |
| San Gregorio di Catania to Ostend | 1,116.21 mi (1,796.36 km) |
| San Gregorio di Catania to Oud-Heverlee | 1,050.33 mi (1,690.34 km) |
| San Gregorio di Catania to Oud-Turnhout | 1,071.19 mi (1,723.91 km) |
| San Gregorio di Catania to Oudenaarde | 1,077.74 mi (1,734.46 km) |
| San Gregorio di Catania to Oudenburg | 1,111.76 mi (1,789.21 km) |
| San Gregorio di Catania to Oupeye | 1,020.38 mi (1,642.14 km) |
| San Gregorio di Catania to Overijse | 1,050.66 mi (1,690.87 km) |
| San Gregorio di Catania to Overpelt | 1,055.63 mi (1,698.87 km) |
| San Gregorio di Catania to Paal | 1,050.55 mi (1,690.70 km) |
| San Gregorio di Catania to Peer | 1,049.82 mi (1,689.52 km) |
| San Gregorio di Catania to Pepinster | 1,008.08 mi (1,622.36 km) |
| San Gregorio di Catania to Peruwelz | 1,059.65 mi (1,705.34 km) |
| San Gregorio di Catania to Perwez | 1,034.68 mi (1,665.16 km) |
| San Gregorio di Catania to Philippeville | 1,016.95 mi (1,636.62 km) |
