| San Felice Circeo to Opwijk | 795.20 mi (1,279.75 km) |
| San Felice Circeo to Ostend | 842.71 mi (1,356.21 km) |
| San Felice Circeo to Oud-Heverlee | 775.54 mi (1,248.12 km) |
| San Felice Circeo to Oud-Turnhout | 795.92 mi (1,280.91 km) |
| San Felice Circeo to Oudenaarde | 803.99 mi (1,293.89 km) |
| San Felice Circeo to Oudenburg | 838.23 mi (1,349.01 km) |
| San Felice Circeo to Oupeye | 745.08 mi (1,199.09 km) |
| San Felice Circeo to Overijse | 776.03 mi (1,248.90 km) |
| San Felice Circeo to Overpelt | 780.24 mi (1,255.68 km) |
| San Felice Circeo to Paal | 775.32 mi (1,247.76 km) |
| San Felice Circeo to Peer | 774.45 mi (1,246.35 km) |
| San Felice Circeo to Pepinster | 732.77 mi (1,179.28 km) |
| San Felice Circeo to Peruwelz | 786.42 mi (1,265.62 km) |
| San Felice Circeo to Perwez | 759.96 mi (1,223.04 km) |
| San Felice Circeo to Philippeville | 742.97 mi (1,195.69 km) |
