| Montegrotto Terme to Opwijk | 523.14 mi (841.91 km) |
| Montegrotto Terme to Ostend | 575.32 mi (925.88 km) |
| Montegrotto Terme to Oud-Heverlee | 501.84 mi (807.64 km) |
| Montegrotto Terme to Oud-Turnhout | 517.70 mi (833.16 km) |
| Montegrotto Terme to Oudenaarde | 535.97 mi (862.56 km) |
| Montegrotto Terme to Oudenburg | 570.76 mi (918.55 km) |
| Montegrotto Terme to Oupeye | 467.03 mi (751.62 km) |
| Montegrotto Terme to Overijse | 503.40 mi (810.14 km) |
| Montegrotto Terme to Overpelt | 500.55 mi (805.56 km) |
| Montegrotto Terme to Paal | 497.73 mi (801.01 km) |
| Montegrotto Terme to Peer | 495.01 mi (796.64 km) |
| Montegrotto Terme to Pepinster | 454.65 mi (731.68 km) |
| Montegrotto Terme to Peruwelz | 521.35 mi (839.03 km) |
| Montegrotto Terme to Perwez | 486.92 mi (783.62 km) |
| Montegrotto Terme to Philippeville | 474.88 mi (764.25 km) |
