| Neckargemund to Novi di Modena | 326.25 mi (525.05 km) |
| Neckargemund to Novi Ligure | 320.23 mi (515.36 km) |
| Neckargemund to Nuoro | 627.72 mi (1,010.21 km) |
| Neckargemund to Occhiobello | 335.48 mi (539.91 km) |
| Neckargemund to Oderzo | 303.19 mi (487.94 km) |
| Neckargemund to Oggiono | 250.79 mi (403.61 km) |
| Neckargemund to Olbia | 586.71 mi (944.22 km) |
| Neckargemund to Oleggio | 262.24 mi (422.04 km) |
| Neckargemund to Olgiate Comasco | 249.59 mi (401.68 km) |
| Neckargemund to Olgiate Olona | 259.86 mi (418.21 km) |
| Neckargemund to Omegna | 243.60 mi (392.03 km) |
| Neckargemund to Opera | 277.80 mi (447.07 km) |
| Neckargemund to Oppeano | 304.07 mi (489.36 km) |
| Neckargemund to Orbassano | 308.80 mi (496.96 km) |
| Neckargemund to Orbetello | 494.26 mi (795.44 km) |
