| Willebroek to Novi di Modena | 522.30 mi (840.56 km) |
| Willebroek to Novi Ligure | 481.24 mi (774.49 km) |
| Willebroek to Nuoro | 780.01 mi (1,255.31 km) |
| Willebroek to Occhiobello | 539.41 mi (868.10 km) |
| Willebroek to Oderzo | 521.16 mi (838.73 km) |
| Willebroek to Oggiono | 430.43 mi (692.71 km) |
| Willebroek to Olbia | 742.86 mi (1,195.52 km) |
| Willebroek to Oleggio | 425.35 mi (684.54 km) |
| Willebroek to Olgiate Comasco | 421.40 mi (678.18 km) |
| Willebroek to Olgiate Olona | 428.69 mi (689.92 km) |
| Willebroek to Omegna | 403.30 mi (649.05 km) |
| Willebroek to Opera | 451.48 mi (726.58 km) |
| Willebroek to Oppeano | 506.86 mi (815.71 km) |
| Willebroek to Orbassano | 443.43 mi (713.64 km) |
| Willebroek to Orbetello | 677.79 mi (1,090.81 km) |
