| Donaueschingen to Novi di Modena | 240.25 mi (386.64 km) |
| Donaueschingen to Novi Ligure | 221.09 mi (355.80 km) |
| Donaueschingen to Nuoro | 529.22 mi (851.69 km) |
| Donaueschingen to Occhiobello | 255.59 mi (411.33 km) |
| Donaueschingen to Oderzo | 240.87 mi (387.64 km) |
| Donaueschingen to Oggiono | 155.16 mi (249.70 km) |
| Donaueschingen to Olbia | 488.64 mi (786.38 km) |
| Donaueschingen to Oleggio | 162.70 mi (261.84 km) |
| Donaueschingen to Olgiate Comasco | 151.51 mi (243.83 km) |
| Donaueschingen to Olgiate Olona | 161.29 mi (259.57 km) |
| Donaueschingen to Omegna | 143.44 mi (230.85 km) |
| Donaueschingen to Opera | 180.75 mi (290.88 km) |
| Donaueschingen to Oppeano | 223.07 mi (359.00 km) |
| Donaueschingen to Orbassano | 208.66 mi (335.80 km) |
| Donaueschingen to Orbetello | 403.08 mi (648.70 km) |
