| Herstal to Novi di Modena | 467.63 mi (752.58 km) |
| Herstal to Novi Ligure | 433.57 mi (697.77 km) |
| Herstal to Nuoro | 736.98 mi (1,186.06 km) |
| Herstal to Occhiobello | 483.17 mi (777.59 km) |
| Herstal to Oderzo | 461.85 mi (743.28 km) |
| Herstal to Oggiono | 378.19 mi (608.63 km) |
| Herstal to Olbia | 698.69 mi (1,124.43 km) |
| Herstal to Oleggio | 376.34 mi (605.65 km) |
| Herstal to Olgiate Comasco | 370.56 mi (596.36 km) |
| Herstal to Olgiate Olona | 378.58 mi (609.26 km) |
| Herstal to Omegna | 354.53 mi (570.56 km) |
| Herstal to Opera | 400.73 mi (644.91 km) |
| Herstal to Oppeano | 450.69 mi (725.31 km) |
| Herstal to Orbassano | 400.83 mi (645.08 km) |
| Herstal to Orbetello | 626.78 mi (1,008.71 km) |
